Ecosmart Tankless Water Heater Review

Do you love EcoSmart and want to know about its series?

We have discussed EcoSmart tankless water heater review with the most prominent and trendy models. EcoSmart is equipped with the latest technology with the most energy-efficient products. Ecosmart reviews tell that all the series have innovative flow sensor technology that makes them different from others. With the working potential at least activation limit, EcoSmart tankless water heater has beaten the market.

Mostly, the water heaters are equipped with a manual thermostat, but EcoSmart has come up with the automatic type.

From larger to smaller homes and points of use, you would get all types of water heaters in this review. Keep in mind, all the heaters, small or large, meet the safety requirements and quality standards.

Ecosmart Tankless Water Heater Reviews

ecosmart tankless water heaters

EcoSmart tankless water heater warranty

Different EcoSmar series come with different warranty times. A typical gas-powered tankless water heater comes with a warranty of 12 years for heat exchangers. On the other hand, the electric-powered heater offers a lifetime warranty. The POU series has the least warranty time that is 1 year.

EcoSmart tankless water heater issues

Most customers complain about the leaking of their heater after some time. We do not deny this issue, but the main reason for this common problem is the lack of maintenance. They need good maintenance after a specific time interval to clean the lime scales. You do not need to call for a professional. This task can be done at home with great ease.

Top 5 Ecosmart Tankless Water Heaters


Eco 8 Model

  • 7.5 GPM
  • 0.82 Energy Factor Rating
  • Gas, Outdoor

Eco 11 Model

  • Max GPM 8
  • 0.80 Energy Factor Rating
  • Natural Gas, Indoor

Eco 18 Model

  • Max GPM 6.6
  • 0.82 Energy Factor Rating
  • Natural Gas, Indoor

Eco 27

  • Max GPM 10
  • 0.93 Energy Factor Rating
  • Natural Gas, Indoor or Outdoor
Eco 36
  • Max GPM 6.6
  • 0.93 Energy Factor Rating
  • Natural Gas, Outdoor

EcoSmart top series

EcoSmart has boomed the market by launching its three sizzling series of tankless water heaters. From the point of use to the full home service and electrical powered to the natural gas or propane power, these may vary in multiple scenarios. These series are;

  • An Eco series that has a large variety of models to fit in multiple climates and small to large space.
  • An ESG series to provide efficient power by using the force of a gas
  • A POU series to fulfill a smaller need for warm water. This series has a point-of-use water heater.

Eco series

Generally speaking about the Eco series, all the offered models has a compact design that can be installed in any place. Their appearance is so good that they do not look odd at your place. It can be mounted indoors and outdoors without the need to hide them.

If you deal with the Eco series a bit nicer, you would be served for at least 20 years. The durability is ensured by the stainless steel or copper heat exchanger that is the prominent quality of the whole series. Plus, the same construction prevents corrosion from being developed. Eco series come with a map to check the water flow in your location.

1. Eco 8 


EcoSmart Eco 8 comes with a very lightweight that need 8000 watts at 240 volts to become fully functional. This model is equipped with self-modulation technology that is very smart to track the requirement and work accordingly. This series is the latest one that is adorned with advanced features.

The same technology never lets warm water get short.

Like other models of EcoSmart, this model is very efficient to save energy up to 60% that makes it useful. The internal water heater is made of copper and stainless steel. This construction makes it a very durable product. Plus, corrosion and leakage would not produce so, there are zero chances to develop leakage.

The temperature can be controlled digitally with the help of an integrated display. You can set the temperature according to your requirements in a specific location.

The design is very compact to save space. Just install this unit, and it would save space up to 12 cubic feet. You are offered a warranty of a lifetime, but the accidental damage does not entertain by the company.

Best of all, the unit comes with a remote control that makes the temperature adjustment very simple.

  • The size is compact and small with a very smaller weight
  • The self-modulation technology saves the power
  • The remote control makes the dealing very easy
  • Installation is very simple and quick
  • Extra wiring is necessary to install it
  • Not fit for whole-home usage
  • Only for point of use

2. Eco 11 Model

Eco 11 Model

With good organization, EcoSmart 11 efficiently increases the water temperature up to 105 Fahrenheit. This temperature water limit acts as an initiative to deliver freshly warm water to all the connections. The temperature can be managed according to your specific demand with a 1-degree increase.

When we talk about lower temperatures, say 67 Fahrenheit or below, the performance gets affected. The flow rate becomes low, and a higher limit of water temperature gets lower.

When you want to lower down your monthly expenses, start it by saving electricity by using Eco 11. The mentioned model of tankless water heater lowers your electricity bill up to 60%.

The main reason behind this saving is the working strategy. The unit gets on and starts working only at the specific time you need warm water.

Ecosmart 11 installation is very easy and ready to use. A copper gauge wire #6 and a power supply of 60 Amp are needed to complete the installation process. Ease of usage is accomplished by the automatic temperature setting by this unit.

Although the mentioned model is easy to install, hiring a professional would be worthy of getting flawless installation. Otherwise, the warranty of the product would be adversely affected.

The company offers you a lifetime warranty when you aim to use this model for typical home usage. To ensure all these favors, we recommend you hire a professional and let him install without any damage.

  • The internal components are made of stainless steel or copper that increase its life and stop the unit from being leaking
  • The size is smaller and compact to fit in a smaller space
  • The capacity of warming the water is 2 gallons per minute
  • Eco 11 is good for small to medium-sized home
  • It is good for the environment with a surrounding temperature of more than 67 Fahrenheit
  • The point of use design cannot entertain your full home.
  • A restrictor is required for a perfect installation
  • Only professional installation attracts a lifetime warranty that needs additional cost.
  • Not good for an extremely cold environment

3. Eco 18 Model


EcoSmart has designed this model for full home usage. Though the size is small and compact, you would be served for the entire home. With the small size, you can save space up to 12 cubic feet. Put this unit in a cabinet or other narrow places, and it would not resist.

The heat exchanger is constructed by copper or stainless steel that increases its working life by more than 18 years. This metal construction does not increase its weight hence, making the installation super easy.

It uses the power of electricity to serve you warm water. As compared to the gas heater, EcoSmart 18 has 10 to 15% higher efficiency. This design has made the installation super simple as no gas valve, or duct is needed.

The groundwater determines the level of maximum temperature offered by Eco 18. Plus, a cold climate demands more time to increase water temperature as compared to a medium one. The cold surrounding also decreases flow rate below 4.4 GPM, which is the maximum limit in optimum conditions.

In an area with a higher temperature, Eco 18 can entertain more fixtures due to the increased flow rate. Alternatively, low groundwater temperature decrease flow rate, hence fewer fixtures are being supplied with hot water.

The temperature can be adjusted from 80 Fahrenheit to 140 Fahrenheit with the support of an integrated chrome dial. Amazingly, the thermostat automatically adjusts the range in case of abnormal temperature. As you turn the tab on, Eco 18 takes 30 seconds or less to increase the temperature to your required level.

Eco 18 demands zero ventings in contrast to the gas water heater that makes its installation super easy in less money. With smaller maintenance, you can enjoy its service for longer.

  • The size is very small that makes the installation very quick at any place
  • A lifetime warranty is offered by the manufacturer for Eco 18
  • The tag price is not too high in comparison to similar models
  • DIY installation my destroy the warranty due to a damage
  • The Eco 18 is not very strong to cope with the harsh outdoor environment. So, you can install only indoor.

4. Eco 27 Model


The electric power system has made effortless installation possible. You do not need to spend additional dollars on installation as demanded by the gas water heater type. Eco 27 demands zero ventings as it needs no gas line or air supply. Electricity is enough to fulfill the whole need. This aspect and smaller size work collectively to adjust it at smaller space.

Ecosmart 27 tankless water heater reviews show that the installation is super simple, but the manufacturers have to mention it in the manual to call for an expert. This step is necessary to save the warranty as the damage done by the heater owner does not entertain by the company.

Additionally, strong maintenance is not the demand of Eco 27 due to copper or stainless steel interior. Not only does the conductivity get better, but also corrosion does not develop on it. Resultantly, life gets better with fewer leakage chances.

The parts offered by Eco 27 are easy to replace and comes with a lifetime warranty.

The flow rate of 6 gallons per minute is pretty good to fulfill your home’s need. This capacity is enough to entertain multiple fixtures at a time in a warmer surrounding. On the other hand, the flow rate lows up to 3 GPM at the lower temperature, say 37 Fahrenheit. But, this capacity is still enough to serve more than one fixture.

The self-modulation technology is integrated to keep an eye on two factors. First, it tracks the outer temperature, and second, it detects your demand. Self-adjustment is done, as a conclusion, to provide you enough satisfaction. The hibernation mode gets active in a hot climate, or warm water started to flow in pipes in a cold environment.

You should install this heater indoors to ensure safety. The jumpers are integrated with this model to maintain water temperature up to 105 F. This trick provides an extra layer of safety for using Eco 27.

  • Works both in a hot and cold surrounding
  • Internal jumpers make it safe to use
  • The temperature gets adjusted due to self-modulation technology
  • Installation demand no extra venting
  • Sturdy interior to prevent rust and corrosion
  • Designed for indoor installation only
  • It cannot be installed without an expert
  • The startup may take time

5. Eco 36 Model


This model of Eco series has the capacity to serve your full home. Its design is very special to serve the hot water to a large number of fixtures at a time. With this model, there is no need to mount heating units at multiple points.

Eco 36 left you with full control over the temperature. It does not offer a range for water but, an exact temperature of the water is delivered all the time. It is adorned with self-modulation technology. This technology tracks your need for water and serves accordingly.

It saves your electricity bill by simply drawing the current that is the exact need of your service. This is a very efficient way to cut down the electricity that makes it different from other units.

Eco 36 works automatically according to your living environment. With the groundwater temperature of 40 Fahrenheit or low, the flow rate shifts around 3 to 4 GPM. This capacity is enough to serve one or two fixtures.

On the other side, with somewhat moderate winter, the flow rate may be shifted to 6 to 8 gallons per minute. In short, the flow rate varies according to the locality, with the least flow rate in extreme control.

No doubt, the installation is very simple, but we advise you to get the services of a professional so you might not destroy its lifetime warranty. Additionally, you need some extra parts to install it correctly that include a 40 A-line, electrical kit, #8 wirings of copper. For full usage, it demands 40 Amps.

  • It offers adjustable control over temperature with a 1-degree increase
  • Self-modulation technology reduces power usage by tracking the exact requirements
  • The energy cost cuts down up to 50 percent
  • The tag price is a bit higher due to its intelligent technology
  • The installation my need additional component that needs an extra amount
  • The flow rate may vary according to a locality

ESG series

The whole series of ESG use the power of gas to offer warm water. The output power of the burner is between 11,000 BTUs and 199,000 BTUs. It needs the exact demand that is necessary to provide temperature according to your water need.

The ESG series brings the demand of recirculation with it to push the unused hot water back; thus, the heated water sits at your knob step. You have to spend additional dollars on this pump to save the wastage of water.

ESG 95 model

With 84 percent recovery efficiency, ESG 95 is large in size and most powerful that use gas as a power source. With a maximum flow rate of 9.5 GPM, this model can serve you a full home. Like other units, its flow rate gets low. According to our study, the minimum flow rate and minimum activation flow recorded are 0.26 GPM and 0.4 GPM, respectively.

ESG 9 features an energy factor of 0.95 with the heat exchanger of copper. On the other hand, with the stainless steel heat exchanger, the energy factor increases up to 0.96. This profile makes ESG 95 a very durable product. Plus, the emission of nitrogen oxide is very low to make it an environment-friendly unit.

The temperature can be controlled with the help of a built-in digital display. The affordable temperature range of this model is 85 Fahrenheit and 104 Fahrenheit. Don’t forget to appreciate a hot-start program that is active to avoid temperature fluctuation.

A self-diagnostic system is here to deal with repeated maintenance.

  • Save for environment as provide very low nitrogen oxide
  • Self-modulation technology reduces power usage by tracking the exact requirements
  • Fit for low flow fixture
  • Ideal for 0.5-inch gas line
  • A self-diagnostic system makes the maintenance very easy
  • The size is very big and fit for commercial level usage

ESG 84

EcoSmart ESG 64 offers a tankless water heater that is non-condensing. The copper metal makes the heat exchangers that make the inner design more strong. Furthermore, the mentioned construction lets the heater extremely durable and safe to use.

The corrosion and rust cannot be developed at the copper surface so, there is zero chance of leakage.

The flow rate can differentiate that depends on a large number of factors. Its least flow rate is 0.4 GPM. On the other side, the activation flow offered by ESG 64 is 0.4 GPM. The maximum flow rate provided by this model is 6.4 GPM. This capacity is enough to serve a medium to full-size home.

ESG 64 has the same energy efficiency as other models of its breed that is between 83% and 84%. The venting is needed for indoor installation that is needed 3/5 concentric vents.

A hot-start system is very efficient to deliver you with non-stop hot water during the whole usage.

  • It is good for high-demand applications
  • Energy efficiency is from 83% to 84%
  • Safe for the environment
  • UEF value is low
  • The venting option is not flexible

POU series

POU series has been built to meet the low water demand. The warranty time provided by the POU series is lower than other series of EcoSmart. These mostly point to use types to serve a single connection nearby

1. POU 6


When you talk about the POU series, then POU 6 comes to mind due to its wide popularity. The maximum flow rate offered by this unit is 1.5 GPM. It is small in size and ideal for point of use. It can entertain one sink at bathroom, or kitchen, RV, or more.

The style is too compact to fit under the sink or other narrow space. The usage is flexible that allows it to switch off when you do not need warm water.

This water heater is very simple in construction and has no thermostat to manage hot water. The temperature cannot be controlled with it can be managed by flow rate. Alternatively, the temperature of water increases statically. The temperature range is 72 Fahrenheit to 105 Fahrenheit.

A digital screen is integrated to track the temperature of the water. The level of water is enough to have a good shower or washing dishes in your kitchen. In the cold climate, POU 6 gets less functional and cannot offer constant warm water with high demand.

With the compact style, good quality materials come forward to make its construction. Stainless steel makes the heat exchanger while the heating element is made of brass or copper.

  • It can serve you even with low flow
  • The inner construction is made of strong material making it durable
  • The digital screen is available to track the temperature
  • Extremely light in weight with a small and compact design
  • Professional installation is needed that demand additional cost
  • No thermostat is available
  • Supply only one connection nearby

2. POU 3.5

POU 3.6

This model of POU 3.5 is very active to provide warm water to the single connection due to its point of use design. You would get hot water at 0.5 GPM. This capacity makes it a good choice for a location that needs less water like a boat or a similar location.

With the groundwater temperature 57 Fahrenheit or below, the performance gets affected. Alternatively, this unit is good for an environment with a medium temperature.

The integrated technology is very advance to cut down energy usage while saving energy. As compared to a typical water heater, the energy saving is 60 percent more.

A very low activation flow of 0.2 GPM is needed to start the device. After activation, the flow sensors start working to modulate the flow. The usage of energy is according to the flow rate that varies from low to high.

POU 3.5 is equipped with a digital screen that allows you to keep an eye on the current temperature. The temperature can be adjusted according to your requirements with a 1-degree increment. The temperature range offered by POU 3.5 is 80 Fahrenheit to 140 Fahrenheit.

The compact and lightweight design makes the installation very easy and quick. The same size allows its fitting below the sink or similar narrow space. As you place this heater near the sink so, you do not need to wait for warm water. Additionally, it cuts down the need for a longer pipe.

You need to manage 100 Amps electrical panel and #AWG wire. Plus, ½ inch plumbing connection is also a strong need for a successful installation.

One year warranty is offered for heat exchangers and other parts. No doubt, the warranty time is too short but manufacturers claim that the quality of this tankless water heater is very good to serve you for a longer time.

  • The energy-saving capacity is up to 60 percent
  • Internal parts are made of copper and stainless steel that avoid leakage
  • Smart, sleek, and compact design save the space
  • For activation low flow rate is required
  • Digital display offers simple control
  • Warranty duration is not good
  • It can serve one connection at a time

Frequently Asked Questions ( FAQs )

1. In addition to EcoSmart; what brands produce tankless water heaters?

In addition to EcoSmart, other brands to offer EcoSmart are Rinnai, Rheem, Stiebel Eltron, Hike Crew, or more.

2. What are the negative points of a tankless water heater?

Everything that offers huge advantages also produces some disadvantages. A tankless water heater has the following disadvantages;

  • The installation demands extra cost for required parts and professionals to be hired.
  • The maximum flow rate may fluctuate according to location
  • Their price may be high than traditional heaters
  • This type of heater is not for the environment with the least temperature.

3. Enlist the advantages of a tankless water heater?

The prominent advantages of tankless water heater are as follows:

  • The integrated technology is very smart to ensure energy efficiency
  • You would get unlimited warm water
  • Most series come with sleek, smart, and compact model that saves space very effectively
  • The outer appearance is very appealing and does not look odd.
  • There is no space for leakage because the internal parts are made of copper or stainless steel that ensures durability.
  • It uses one of the different fuels that include electricity, natural gas, and propane. If you have less electricity in your living area, then you can rely on the gas type and vice versa.
  • The tankless water heaters use less amount of fuel yet provide full functions

Final Words

Here, we are going to conclude EcoSmart tankless water heater review. After a full review, we are come up with the result that there are different series of EcoSmart tankless water heaters. All are different in multiple scenarios from technologies to flow rate.

Talking about the Eco series, the flow rate is not too high and these are not suitable in extreme cold. On the other hand, the ESG series offers larger heaters that provide intense war, water regardless of surrounding temperature as they use gas as the main power source. The POU series bears point-of-use models that can serve you even at a low flow rate.

After reviewing EcoSmart, we hope that all the confusion in your mind would be gone. Now, you can find the product of your choice with good confidence while enjoying a strong insight.

Our Recommendation

If you live in a cold surrounding where the groundwater has the least temperature, get the one from the ESG series. Moreover, you can pick the same for commercial usage. It comes in large size to provide full-fledged service. It uses the power of gas to warm the water so, the intensity of heat may not below.

For general home use with medium climate temperature, the Eco series would be ideal. The whole series of ECO use electricity as the power source that makes the installation very simple and quick. The flow rate offered by this series is enough to meet the demand for a full home.

POU series is specifically for point of use. If the flow rate is low in your area, then you can install any model of the POU series to be served. You can place them below the kitchen or washroom sink to get warm water from the respective tab.

Navien Tankless Water Heater Reviews

Do you want to cut down utility bills? Read Navien tankless water heater reviews before going for final purchase.

Not very famous, Navien also produces a large variety of tankless water heaters to compete in the market. All the products of Navien entertain you with some common properties, including long-lasting, energy-efficient, and good quality. The lower installation fee makes it different from its competitors.

Previously known as Kyung Dong Machinery Co., Ltd, the company changed its name to Navien in 2006. Mainly, this company works on condensing techniques, in addition to green technology. The main aim behind their strategy is to enhance comfort at your home.

Navien Tankless Water Heater Reviews

Navien Tankless Water Heater

Warranty of Navien tankless water heater

All the tankless water heaters of Navien come with a warranty time of 15 years for their heat exchanger. This time is very large than the other models belongs to very famous brands. Even the Rinnai, the most famous, does not offer this longest warranty time.

Throwing light on parts with respect to warranty, Navien offers 5 years warranty time on parts and one year for labor.

Installation of Navien tankless water heater

Generally, Navien tankless water heater demands 4 hours for a successful installation. If we compare, this time is lower than other units. The PVC exhaust technology has made the installation easier. Plus, the installation instruction is clear and simple to understand for every user. Despite this, the manufacturers suggest managing a professional to ensure a flawless installation.

Call for an HVAC expert to deal with Navien tankless water heater concerning installation.

Maintenance of Navien tankless water heater

Although Navien tankless water heaters are adorned with high-quality parts, yet it demands regular maintenance for non-stop service. You can get updates regarding any problem by the usage of an integrated control panel.

Navien tankless water heater series

NPE-Advanced series

Navien is trying to persist in the market by its two active series. These two series include the NPE-Advanced series and NPE standard series. Both these series have stepped into the market after getting energy star certification. Plus, higher efficiency is another feature that cannot be neglected.

This brand’s main fuel is gas that provides the necessary input to tankless water heaters that are designed on condensing technology.

Let us discuss different models from both series one by one.

a) NPE-Advanced series

Navien has introduced comfort flow technology in all its advanced models. This technology is fast enough to produce warm water that takes 1 second to approach. This flow system is very active to maintain the water temperature followed by the consistently warm water in your tab.

This comfort Flow technology takes Navien one step ahead of competitors by combining recirculation pump and buffer tank in a single unit. The buffer tank is specialized to maintain the temperature of stored water up to a certain limit. It bypasses the burst of cold water by its unique technology and advanced composition.

Navien allows you to deactivate an integrated recirculation pump that is followed by decreased utility bills. All the NPE-Advanced models have integrated Wi-Fi control.  This series is a unique combination of decreased NOx ratings and H2Air.

1. NPE-180A model

NPE-180A model

Following the footprints left by the Navien model, we have found these prominent features of NPE-180A.

ComfortFlow technology

NPE-180A is adorned with ComfortFlow technology that comes with a recirculation pump. This technology comes with a well-insulated buffer tank. This composition results in the supply of warm water very quickly. The water never lost its temperature due to strong insulation.

Flow rate

Talking about the maximum flow rate of NPE-180, it comes with 8.4 gallons per minute. This capacity is enough to entertain a large size home with multiple connections. It comes with a cascade capability that allows multiple water heaters to connect to entertain commercial needs.

Normally, it runs on natural gas, but you can convert it to propane type with a convertible gas system.

Environmental friendly

This model of advanced Navien series never left adverse effects on your surroundings. This protection has become possible by the availability of Eco Pre-mix burners. The release of carbon monoxide and nitrogen oxide gets reduced by the mixture of air and gas before the ignition process.

According to manufacturers, this strategy reduces 75% of total gas emissions in the surrounding. This emission of carbon dioxide is the same as 31 cypress trees.

Energy efficiency

Navien’s advanced series ensures comfort and efficiency at the same time. In addition, to the efficiency and comfort comes the energy efficiency is enhanced by the trick that allows water heating only when needed. In this way, the additional cost does no add.

It comes with secondary heat exchangers that allow condensation and expelling additional heat to the surrounding. As a result, your system stays cool while producing warm water. On the same side, the ventilation temperature stays lower with an enhanced energy factor. In short, the overall result of this scenario is energy efficiency followed by the least operational cost.

Strong durability

Burners and heat exchangers are both composed of stainless steel for enhanced durability. Keep in mind the stainless steel is strong enough to bypass corrosion followed by increased life. Moreover, the chanced of leaking out gets destroyed to increase its lifetime.


This model of Navien enjoys the energy star certification that ensures this tankless water heater is safe to use for you and your surroundings. Furthermore, there are other listings for the product that houses this tankless water heater include CSA listing, AHRI listing, and NSF listing.


The company says that this model of the NPE-A series can be installed indoors or outdoor. Its composition is strong enough to tolerate environmental stress. It has been designed for direct venting and comes with a conversion kit to facilitate installation. The secondary accessories that come with this unit include a conversion kit, two pairs of tapping screws and anchor, a bracket for wall mounting, a pair of 2 inches wall flange, and a couple of vent termination caps 2 inches.

  • NPE-180A comes with Wi-Fi for maintenance
  • The flowing water does not lose temperature due to strong insulation
  • It comes with dual heat exchangers made of stainless steel
  • Efficiency is very great
  • This model is safe for the environment due to the production of fewer amount of gasses
  • The installation process does not demand a higher cost
  • Outdoor installation needs external components

2. NPE-210A model

NPE-210A model

NPE-210A model of Navien is specialized to use condensing technology. This system allows you to go for PVC venting that cuts down the use of energy and ensures easy installation.

ComortFlow technology

ComfortFlow technology is the most prominent feature that is enjoyed by the NPE-210A model. This technology brings a recirculation system with it to support you more. A buffer tank is integrated with this model that ensures constant warm water all the time. Actually, the strong insulation steps forward to offer consistent warm water by cutting down heat loss.

Flow rate

The flow rate offered by NPE-210A is 10.1 gallons per minute. This capacity is enough to serve a large home. You can use this powerful unit on a commercial scale to enjoy the non-stop warm water.

Safe for environment

NPE-210A never undergo any function that is followed by environmental pollution. Before ignition, heating gas is combined with air, followed by reduced emission of nitrogen oxide and carbon mono oxide. Specialized, Eco Pre-mix burners are integrated to support the whole system that results in an effect-less environment. Talking in feature, 75 percent of the total amount of expelling gas gets reduced. Plus, carbon dioxide emissions also get reduced by the same technology.

Energy efficiency

You are offed to enjoy non-stop warm water while using less energy. The main trick that NPE-210A follows is that it heats water only at the time you need it. It does not spend energy heating the additional amount of water. It comes with secondary heat exchangers that enjoy the through for condensation to skip additional heat while maintaining a colder system. The necessary heat does not leave the water to maintain its temperature. This feature results in an increased energy factor.


With NPE-210A, you would never run out of warm water, even in the intense cold. It comes with dual heat exchanges that are made of stainless steel. This construction says goodbye to corrosion followed by decreased chances of leakage. In this way, NPE-210A gets a higher chance to serve you for a longer time.


NPE-210A has been designed to fit happily indoor or outdoor. The size is compact and small to support easy installation. It would be fit in your small space. Due to its ‘its smaller size, it can be mounted on the wall. This composition allows direct venting. The gas conversion kit comes with this product to switch between natural gas and propane type.

Other secondary accessories that come with this tankless water heater include one piece of wall mounting bracket, four tapping screws and anchor, A couple of 2 inches vent termination caps, and two pairs of wall flange with 2 inches size.

  • Up to 16 units can be joined together to meet higher demand
  • Allows inexpensive PC venting to save your cost
  • The maximum flow rate is good enough to work for the largest house
  • It comes with a digital control screen
  • The temperature can be adjusted from 98 F to 140 F
  • It comes with an energy star rating
  • It may produce sound when heating water.
  • Outdoor installation may demand an additional cost

3. NPE-240A model

NPE-240A model

Navien is introducing you to a water heater with brilliant performance and low cost. Some of its prominent features are worthy of highlighting here.

Advanced technology

Every company makes its product different by introducing unique technology. Navien also follows the same technique. It comes with a smart preheating system that is cost-effective and saves your time. This system is smart enough to notice the daily routine of your warm water. It produces hot water automatically t that specific schedule and saves you from waiting for a consistent hot supply.

Thus technology not only bypasses cold sandwiches but also consumes a very less amount of energy.

Flow rate

Out of all the tankless water heaters produced by Navien, NPE-240A is the strongest, with 12.2 gallons of hot water per minute. According to a survey, this capacity does not meet even by very famous names in the market. Although the Navien introduces a tankless water heater for general home use, this model can be used for the commercial purpose due to its enough flow rate.

This capacity is enough to entertain seven bathrooms and multiple sinks for general home needs. You would enjoy intense and on-demand warm water with this capacity without any lag.

Energy efficiency

It comes with very strong and sturdy heat exchangers. It can work continuously regardless of intense conditions. These heat exchangers work as the main player to transfer the heat and necessary energy to the water. Talking about the composition of heat exchangers, these are strong enough to manage every kind of stress and corrosion. As a result, these produce zero chances of leakage.

All these favors get functional due to the stainless steel construction that makes it long-lasting and versatile. Due to its strong heat transfer capacity, NPE-240A is considered 97 percent energy-efficient. This feature is amazing in the respect that other models cut down energy only up to 20%.

Additionally, as you turn the tab off, this tankless water heater automatically shuts off automatically to stop the extra energy usage.

Easy to use

The front interface is convenient and easy to use. You can manage the temperature and get an update about flow ate by its crystal clear screen. The lowest temperature range is 98 F that can be managed up to its maximum limit of 140 F. When you change temperature, it gets lower or higher with a 1-degree increment. At the same time, generation warm water may produce some noise, just like the previous model discussed.

  • The flow rate and output is very high
  • Ideal for commercial and other high-end usages
  • The temperature can be adjusted very easily
  • It comes with the water flow sensor
  • Heat exchangers are made of stainless steel to provide durability
  • It does not come with the remote
  • During the operation, some noise produces that may disturb
  • Works on electric ignition system than battery

b) NPE standard series

This series of Navien is cheaper in price than that of advanced models. The product of this series comes with equally amazing energy efficiency that needs very less maintenance. This series demands very less installation cost. The main feature that separates it from the advanced one is the lack of advanced technology.

This unit comes with 0.97 energy efficiency. This standard model has more energy efficiency as compared to a similar product in the market. When comparing it to the electrical heater type, these series find to be more efficient. The condensing technology is fast enough to compensate for the heat loss that makes it superior to the non-condensing type.

This series says welcome to 40 PC pipe to ensure direct venting. It works efficiently to reduce the exhaust heat and sets economical.

1. NPE-150S model

NPE-150S model

NPE-150S is equipped with condensing technology that makes it ideal for general home use or less heavy commercial usage. You can ensure maximum performance while enjoying its energy efficiency.


Like other models of Navien, this model is also equipped with condensing technology. The one thing that makes it different from the advanced series is the recirculation pump that is present in the advanced type. Moreover, the buffer tank is absent in standard type to make it more different.

Flow rate

NPE-150S comes with a flow rate of 6.8 gallons per minute. This capacity is enough to meet the demand for small to medium homes. But, for a large home or commercial purpose, you cannot use this model.

It is capable of cascade formation that makes it useable for commercial or large homes. For this purpose, you can join up to 16 units together.


This unit comes with a very efficient condensing system to ensure warm water all the time. It has dual heat exchangers that are made of stainless steel to make it extremely durable. Plus, the same composition saves the unit from the attack of corrosion.

Safe to use

It is equipped with a metal fiber burner that lets the mixture of air and gas for consistent service. The nitrogen oxide combustion is limited by the use of this tankless model.

This unit works happily with WC for the 0.5-inch gas line. Moreover, the same model can make the use of a gas line with 24 feet. Thanks to its dual venture fan that makes it fit for low pressure of the gas. Plus, the negative pressure gas valve also supports this scenario.

Remote control

Though this unit does not come with remote control, you can buy it separately. The remote is used to manage the recirculation timer, in addition to the hot water timer. So, you have no need to directly deal with the control panel. With the same remote, you can manage the temperature of the cascading system very quickly.

  • The tag price is low with condensing system
  • Two percent more energy-efficient as compared to the previous model
  • It comes with an LCD screen and a very convenient control panel
  • Convertible from natural gas type to propane and vice versa.
  • It comes with the water flow sensor
  • Not fit for a large house or higher demand due to less water flow
  • The outdoor installation may need additional components

2. NPE-180S model

NPE-180S model

This model of Navien also comes with condensing technology that is safe to use. It allows you to enjoy PVC venting that brings easy installation. The most prominent features of the NPE-180S model are as follows;

Safe for environment

This unit comes with an Eco pre-max burner that minimizes carbon monoxide and nitrogen oxide emission to the surrounding. This is done so by mixing air and gas before ignition. It cut down emission up to 75 percent. NPE-180S minimizes the emission of carbon oxide equally by 31 cypress trees.

Flow rate

This model comes with a flow rate of 8.4 gallons per minute that is sufficient to supply the need for small to middle homes. Thanks to its ready-link cascading technology that allows the joining of up to 16 units to meet the greater demand. When it gets link multiple units, a large supply of water can be managed for commercial business.

Energy efficiency

This unit comes with strong energy efficiency that makes it a bit expensive. For the purpose of condensation, this unit comes with a secondary heat exchanger to transform condensation. This process results in the increase of energy factor and decrease of ventilation temperature. The overall result of this construction is the lower cost every month.


Both the heat exchangers and Eco pre-mix burners are made of stainless steel. This construction makes it strong enough to bypass corrosion. As a result, there are zero chances for the leakage that let it be active for a longer time.


This model of Navien can be installed indoors or outdoor. It is so because the overall profile is strong enough to cope with the external environment and thermal stress. Keep in mind that the outer installation demands additional costs.

It comes with a gas conversion kit that allows switching between natural gas and propane type. Other secondary elements that come with NPE-180S models include, A couple of 2 inches vent termination caps, one piece of wall mounting bracket, four tapping screws and anchor, and two pairs of wall flange with 2 inches size.

  • It comes with a white metallic external cover
  • The final tag price is not too high than other models of its series
  • The control panel is easy to use
  • It comes with a conversion kit for switching between gas type to propane
  • Heat exchangers are two in number
  • It comes with an integrated flow sensor
  • Safe to use for the environment
  • Fit for an already available gas pipe of 0.5 inches.
  • The flow rate is not enough to entertain large house
  • It does not come with a recirculation pump


Frequently Asked Questions ( FAQs )

In addition to Navien, what are the other brands that are producing tankless water heaters in the market?

Other than Navien, a large number of brands are offering tankless water heaters in the market that are Rheem, Rinnai, EcoSmart, Eccotemp, Noritz, Takagi, Hike Crew, and more.

Enlist the most prominent advantages of a tankless water heater?

The most important advantages of using tankless water heaters are;

  • They come with built-in advanced technology that makes them very energy efficient.
  • Tankless water heater produces an endless amount of warm water to meet your demand.
  • Most unit comes with a compact design to save the space at your home.
  • The external appearance looks very good to suit your kitchen and bathroom.
  • The internal profile gets strong due to copper and stainless steel that makes it durable by decreasing the chance of corrosion.
  • It comes with multiple varieties that may run on electricity, fuel, or natural gas according to internal design.
  • This unit uses a very less amount of respective fuel to offer hot water.

What are the main series offered by Navien?

Navien offers two main series in the market that are;

  • NPE advanced series
  • BPE standard series

Final verdict

Navien tankless water heater reviews have been discussed due to its extensive demand in the market. After reviewing its series, we have concluded that all the Navien models are equipped with condensing technology that makes them different from the others.

Moreover, the heat exchangers are made of stainless steel to offer durability. This construction maintains the temperature of the water and supplies consistent warm water without cold water.

The NPE-Advanced series is equipped with advanced technology that makes it different from the NPE-Standard type. After reading Navien tankless water heater reviewswe hope that you would find the best model among all series. Now, you have enough insight for which model you should go for that would make the decision super easy.

Our Recommendation

If your budget is short, you can go for any model that belongs to the NPE standard family. All the models of this series are cheaper in price but come with equal durability. Plus, their energy efficiency is strong enough to make a good series that need less maintenance.

On the opposite side, with a strong budget, you can go for an NPE-Advanced tankless water heater. All the products of this line bundled with advanced technology. The recirculation technology supports you more. All the models of this series are durable with stainless steel heat exchangers that make a choice wonderful. You can connect multiple units to manage more burdens.

Takagi Tankless Water Heater Reviews

Do you want to know what series Takagi has introduced in the market?

Takagi is a Japanese brand that stepped into the US market after 2010. Furthermore, the heaters belong to Takagi demands less maintenance, in addition to quality and enhanced safety. It does not produce an electricity-powered water heater. But, natural gas acts as the main power source. Let us tell you that the propane type is also available in today’s market.

At present, people know about Takagi due to its unique products and technology. Its increasing demand has forced us to write Takagi tankless water heater reviews for your sake. In this post, we have tried our best to throw light on all types of series.

The different products are available that belong to unique series that can be used on a residential or commercial level. Their flow rate also differs from providing a wide variety according to location and usage. We proudly say here that Takagi is as good at functioning as any other well-known brand.

Takagi Tankless Water Heater ReviewsTakagi Tankless Water Heater Reviews

Top 5 Takagi Tankless Water Heaters


Takagi Tankless Water Heater Reviews

  • 7.5 GPM
  • 0.82 Energy Factor Rating
  • Gas, Outdoor

Takagi Tankless Water Heater Reviews

  • Max GPM 8
  • 0.80 Energy Factor Rating
  • Natural Gas, Indoor

Takagi Tankless Water Heater Reviews

  • Max GPM 6.6
  • 0.82 Energy Factor Rating
  • Natural Gas, Indoor

Takagi Tankless Water Heater Reviews


  • Max GPM 10
  • 0.93 Energy Factor Rating
  • Natural Gas, Indoor or Outdoor
Takagi Tankless Water Heater Reviews
  • Max GPM 6.6
  • 0.93 Energy Factor Rating
  • Natural Gas, Outdoor


Takagi Water Heater Warranty

For the heat exchangers, all types of series offer 15 years of warranty. The main construction material for this element is stainless steel and copper alloy. Keep in a notice that this warranty time reduces to 12 years when you aim to use a Takagi water heater for commercial or industrial purposes.

Takagi Water Heater Installation

As they use gas for hot water, the installation demands a professional’s services to ensure safety. In case you try to install it yourself, followed by some damage due to zero experience, the company would cancel its warranty.

Generally speaking, the installation process is not complicated and needs significantly less time to start its functioning. Moreover, a detailed manual guide is available to support you at every step during installation.

Takagi Tankless Water Heater Series

Till now, the Takagi has introduced its two series based on a working system. These include condensing and non-condensing types. Both series produce both commercial and residential type water heaters.

Non-Condensing Water Heater

If you are searching for a cheaper Takagi model with nicer functioning, a non-condensing type is here to be selected. The energy efficiency is excellent too. But, honestly speaking, non-condensing energy efficiency does not compete with the condensing type water heater.

1. Takagi T-KJR2-IN-NG

Takagi Tankless Water Heater Reviews

Takagi T-KJR2-IN-NG tankless water heater has been built specifically for a small house that demands less flow rate. This model of Takagi comes at less price and serves you for a longer duration. With the smaller size, its weight is approximately 38 pounds. No doubt, this model is the point of use type but, you can enjoy the warm water in two supplies at once.

In short, if you need a smaller and compact water heater that uses natural gas as a power source, Takagi T-KJR2-IN-NG should come to mind at once.


When it comes to performance, Takagi T-KJR2-IN-NG delivers the same amount of water that is offered by a tank water heater of 40 gallons. From all the series introduced by Takagi, Takagi T-KJR2-IN-NG is the smallest of all.

This model gives you uniform temperature distribution. Some brands come with a feature of temperature limitation. Takagi has solved this issue by ensuring continuous temperature in every case. This is so, and the technology works effectively to set the water temperature at a specific point.

It is equipped with an air-fuel ratio sensor and thermistor to provide the same temperature. This function left you with the confidence to enjoy a consistent temperature. In this way, the efficiency of this tankless water heater never gets disturbed.

When we talk about the environmental effects, it is worth noting that the mentioned product does not release a very high amount of harmful gases to the surrounding. In this way, this product is announced as environmentally friendly.

Additionally, the control system of this water heater shut itself down in case of overheating. This feature works due to the availability of a temperature control system. This is the single model in the non-condensing series that is offering this safety feature.

If you live at altitude, use the integrated DIP switch to adjust the performance accordingly.


Takagi T-KJR2-IN-NG does not demand electric power to provide you warm water. It uses the out power between 19500 BTUs and 140000 BTUs offered by natural gas. This feature lets you save from wasting energy.

Exploring the flow rate, Takagi T-KJR2-IN-NG comes with a capacity of 6.6 gallons per minute. This limit can vary based on your need.

In warmer surroundings with the groundwater of 70F, it would give plenty of hot water for two bathrooms. Alternatively, in the colder surrounding, it would serve one bathroom where groundwater is 50 F. It can be said that either you live in hot or cold, Takagi T-KJR2-IN-NG is always ready to serve you.

Hydronic baseboard and radiant floor work collectively to ensure next-level efficiency and enhanced utility. The temperature can be managed according to your requirements by the use of a remote that comes with Takagi T-KJR2-IN-NG.


Takagi advises you to mount this heater indoors to save it from the external environment. It comes with a detailed manual that directs installation to assist you. Like other brands, Takagi suggests you get the favor of some professional for successful installation followed by your family’s safety.

This tankless water heater uses natural gas as an essential power source. The venting is outdoor that can be done vertical or horizontal.


Takagi T-KJR2-IN-NG comes with a warranty time of 10 years for the heat exchanger and 5 years for its parts. Keep in a notice that this warranty time may revert to zero if you try DIY installation followed by any damage. The company does not take responsibility for any damage that is done by your negligence.


  • It comes with multiple protective features, including freeze protection, surge protection, and more.
  • The construction is compatible with the hard water supply
  • The installation comes with flexible, usable options
  • Efficiency is enhanced with integrated DIP switches
  • Small and compact design fits best with narrow space all the time


  • The installation may cost you additional dollars
  • Flow rate is not sufficient to entertain a large home
  • It may produce noise during working

2. Takagi T-K4-IN-NG

Takagi Tankless Water Heater Reviews

This model of Takagi can run both on natural gas and liquid propane. Takagi T-K4-IN-NG is safe to use for the environment and comes with nicer energy efficiency. Plus, its flow rate is high so, it can be used for a larger home with a greater need for hot water.

It can be mounted on a wall due to its compact and smaller size. Though the size is smaller yet, it can serve a large home. With the consistent flow of warm water, you would encounter minimal fluctuation. Its efficiency is high enough to support commercial needs in addition to residential.


With the advanced design, Takagi T-K4-IN-NG tankless water heater is safe for the environment and convenience and reliability. It is equipped with a thermistor, an air-fuel ratio, and a microprocessor to serve you well.

When talking about performance, the advanced ignition system comes at the top. The heating system is monitored continuously. The parameters are controlled, in addition to water and gas flow. The main aim of these functions is to the temperature accuracy.

A computer chip is integrated into Takagi T-K4-IN-NG that saves this water heater from shutting down. This problem may arise commonly due to faulty gas combustion, least air intake, clogged vents, high temperature, and more.

Efficiency And Power:

This model of Takagi comes with full modulation. This capacity allows you to work with the power output of 11,000 BTUs to 190,000 BTUs. With an energy factor of 0.82, it is lower than condensing type but still excellent to be served.

You can use it with confidence when needed and enhanced water flows due to an integrated modulating gas valve. Similarly, the same feature works the same when you need a reduced flow rate.


The maximum flow rate offered by Takagi T-K4-IN-NG is 8 gallons per minute. It is estimated that the single shower demands 2 gallons per minute. If you live in a warmer area, this water heater will entertain 3 to 4 fixtures simultaneously.

Manufacturers have recommended that the colder area allows Takagi T-K4-IN-NG to entertain 2 or 3 fixtures at a time.


This model comes with 4 integrated temperature settings with a maximum limit of 140 Fahrenheit. You can use DIP switches to manage the temperature; alternatively, the remote control can be used for this purpose.

Safety And Troubleshooting:

Takagi T-K4-IN-NG is equipped with a self-diagnostic system. It detects the problem itself and lets you know by producing red light. This might appear on the computer board in the absence of a remote.

On the opposite side, when you use a remote, the same indication is shown by the error code on the remote screen. The main aim behind this technique is to enhance safety in addition to convenient troubleshooting.

The operation is very safe with integrated freeze protection. This system gets activated in the presence of groundwater less than 36.5 Fahrenheit. This system works in the presence of electricity. Other protective features include a hi-limit switch, pressure relief valve, thermistor, flame sensors, water flow sensors, and more.


For residential use, Takagi T-K4-IN-NG offers a warranty time of 1 year. If you want to use it commercially, you are offered a warranty time of 10 years. Other elements enjoy a warranty time of 5 years.


  • The remote control offers the smooth operation
  • It has a self-diagnostic system that is efficient to provide constant performance
  • The safety features are provided for protective usage
  • The warranty time is perfect for providing non-stop service
  • The design is compact and small to fit a narrow space


  • It comes with four specific temperature settings

3. Takagi T-K3-N

Takagi Tankless Water Heater Reviews

This model is excellently reliable with stainless steel venting pipes. It uses natural gas to offer you endless services. The computerized system has made it very safe to use. It comes with zero pilot light to save energy. Hence, it makes it an energy-efficient product.


The company has designed this unit for indoor installation. But some experts claim that the Takagi T-K3-N profile is brilliant that allows its conversion from indoor to outdoor. But at the same time, they recommend mounting this heater in a recess box to save it from environmental effects.

Temperature Control:

Either you install it indoors or outdoors, you can change the required temperature. There are 8 presets for the temperature of 104 Fahrenheit and 18 Fahrenheit as a minimum and maximum value. This preset is functional when you use a computerized system.

On the other hand, if you are getting remote control services to manage the temperature, you can set the water heater to any temperature limit. Its range is from 99 Fahrenheit to 176 Fahrenheit with the help of remote control.


It comes with next-level performance. Opposite to the other tankless water heater, Takagi T-K3-N works equally well in less quantity of fresh air. This capacity makes it versatile as compared to the other indoor type water heater. Moreover, this service is supplied by the sealed combustion and power-vented flue.

Amazingly, the gases that are exhausted as a result of working can expel at the height of 50 feet. This feature saves the population from harmful gases very effectively.

Flow Rate:

When talking about maximum flow rate, it comes to know that Takagi T-K3-N has a capacity of 6.6 gallons per minute. This level is enough to meet the demand for small to medium homes. If you need warm water more than this limit, you can take the services of an easy-link system any time you want.

This system is very active to join multiple similar connections with each other. This trick not only offers an enhanced flow rate but offer a good power. If you own a larger home, your living area is mostly covered by cold temperature, or you want to use it on a commercial level, this connection system would work well.

Talking about the minimum flow rate, you can enjoy 0.5 gallons per minute. If the water flow is low in your area, you would be served with warm water for sure. This feature is enabled due to the electronic circuit board, in addition to the gas modulating valve.


  • Multiple units can be connected in a row to get plenty of warm water with enhanced power
  • It comes with a remote control that allows you to choose any point of temperature
  • The size is small and compact; hence, it can be mounted in a narrow place
  • Emitted gases reach up to 50 feet to save the general population
  • It can work equally well in the absence of fresh air


  • The computerized system allows only 8 preset temperature to enjoy

Condensing Water Heaters

Takagi’s condensing water heater uses copper alloy and stainless steel as the primary constructional material for their heat exchangers. This composition very effectively bypasses the corrosion, followed by zero leakage chances.

Plus, the same construction is specialized to warm the water with the help of combustion gases to reduce energy usage. This advanced trick not only makes it an efficient unit but also reduces the operating cost.

4. Takagi T-H3-DV-N

Takagi Tankless Water Heater Reviews

Takagi T-H3-DV-N is another indoor type water heater that is compatible to use for commercial or residential purposes. It produces a significantly lower amount of nitrogen oxide gas that makes it safe for the environment. The next-level copper alloy makes the whole composition of heat exchangers. You can use it for heavy applications in a house.

Amazingly, it can be used at a height of 10,100 feet. Based on the temperature of groundwater, the flow rate may be changed. In a warm season, it can entertain up to four supplies that are reduced to three in the cold season.


This condensing type water heater comes with a large variety of protective features. It detects the problem itself and fixes it accordingly. This trick makes it an excellent choice to ensure safety. In addition, the protection is enhanced with multiple protective functions that include overheating, freeze control, surge protection, and more.

The company claims that Takagi T-H3-DV-N is exceptionally safe to use as they used zero lead in its construction. This feature adds an extra layer of security.

Multiple Connections:

This tankless water heater happily offers multiple connections with different devices. With or without the presence of a multi-unit controller, it can offer you to entertain with three or more units at a time.

Flow Rate:

This unit enjoys a good flow rate of 10 gallons per minute. This capacity is sufficient to fulfill the need for a larger home. Alternatively, it can be used for commercial purposes. If you live in a cold environment, the same water heater will not let you run out of warm water. Its fast working works amazingly to offer warm water within seconds.

An electric water heater offers 2 to 4 gallons of water per minute that is too low as compared to this natural gas type heater.

Condensing System:

In contrast to the non-condensing type, this unit its combustion chamber allows steam condensation. As a result, the warm water is produced to be drained out of the chamber. If we compare it to the natural gas water heater, this system produces warm water efficiently. Moreover, this unique system produces no mess as it clean to use.

Its integrated burners and heat exchangers quickly arrange the hot water regardless of the incoming water temperature. This is the main trick that does not let you get short of warm water in any season.


Takagi T-H3-DV-N tankless water heater comes with an efficient and easy installation system. Furthermore, the style is a direct venting type that makes the installation very convenient. The manufacturer advises you to mount this model indoors to ensure safety.


This tankless water heater is very durable and reliable. It enjoys the energy star certification with a value of 0.95.


The maximum limit of water that can be attained with Takagi T-H3-DV-N is 18 Fahrenheit. This is the maximum temperature that Takagi offers. The temperature can be managed very quickly with the help of a remote. It shows error code in the presence of a problem in any internal process. Keep in mind the remote control does not come with this tankless water heater. You need to have purchased this remote separately.


  • With the warm water, there would be no hot gas in the supply
  • The flow rate is outstanding in supplying the warm water to large home
  • Installation is super easy and straightforward
  • This unit is amazingly durable due to its sturdy profile
  • It comes with shallow carbon footprints as compared to its competitors


  • The company does not take responsibility for its repairing

5. Takagi T-H3M-DV-N

Takagi T-H3M-DV-N

Takagi T-H3M-DV-N is very efficient to entertain multiple connections at a time. In addition to efficiency, it comes with amazing power and a nicer warranty.


Takagi T-H3M-DV-N is offering you a flow rate of 10 gallons per minute. This capacity is higher than other outdoor or electrical-powered heaters. Their maximum flow rate is 8 GPM and 2 to 3 GPM, respectively.

This unit offers warm water very instantly as you need it. Coming towards the power, it needs minimum power of 199,000 BTUs to let it fully functional. No extra parts are required in order to install to use maximum service.

Their weight is 60 pounds that are too heavy to be lifted, so choose the most suitable place and mount it once.


This unit needs natural gas to heat the water. As the cold water is felt in the pipes, Takagi T-H3M-DV-N

Let its burner on in addition to heat exchangers. This process may release fumes into the surrounding. As it uses the condensing system, the steam has been condensed in the combustion chambers, followed by warm water draining.

When we compare Takagi T-H3M-DV-N to other similar products, it gets to know that this unit is clean to use and more efficient. The condensing system brings about its efficiency. This is a unique technology that other brands do not offer.

Heat Flow:

The maximum temperature offered by Takagi T-H3M-DV-N is 185 Fahrenheit. This limit is unique to provide intense warm water. If you live in a colder area, this model will give you enough warm water ignoring groundwater’s lower temperature.

If your surrounding temperature is somewhat moderate, then you can get the water accordingly.


The draining system has made the installation somewhat complicated. This fact prevents you from going for self-installation. The DIY installation would destroy the parts, followed by the destruction of the warranty. If you know its installation, you need ground wires, a hose, a valve kit, and a drain.

Additionally, if you live in a location that produces acidic water, we recommend getting an acid neutralizer kit to manage this kind of water. The remote control can be used to manage the temperature according to your demand.


  • Its power is perfect for serving residential and commercial demand.
  • No need for vents due to condensing system
  • The working is very clean and efficient


  • The weight is very high that makes it less portable

Frequently Asked Questions ( FAQs )

1. What are the other famous brands that are offering tankless water heaters?

In addition to Takagi, other famous names are Rheem, Rinnai, EcoSmart, Noritz, Stiebel Eltron, Hike Crew, and multiple others.

2. Where are Takagi tankless water heaters made?

Takagi is a company in Japan and offers tankless water heaters from the same country. The company provides residential heaters in addition to commercial products. They differ in flow rate and technology that make them unique.

3. Point out the disadvantages of tankless water heaters?

Every device that provides vast advantages also offers some disadvantages. A tankless water heater has come up with the following disadvantages;

The installation process needs additional costs for the parts and professionals required to be hired.

The maximum flow rate may vary depending upon the location.

Their tag price may be higher as compared to the heaters.

This may reduce the working capacity in the temperature with extreme cold.


We have done fine research followed by Takagi tankless water heater reviews. According to our study, Takagi has stepped into the market with its two series. Both series bear the tankless water heater with nicer quality and optimum temperature availability.

Non-condensing Takagi tankless water heater comes at less price. Its size is smaller yet provides an excellent flow rate. It is equipped with multiple safety features to ensure protective functioning. It includes overheating, freeze protection, or more.

If we talk about condensing type, the technology gets changed. These can be used on an industrial scale in addition to residential use. You can pick this type, if needed, a durable product.

After reading this detailed review, we are confident that you would never be confused about its functioning and other basic information.

Our Recommendation

If you need plenty of water heaters to fulfill the need of a commercial level, Takagi T-K4-IN-NG is a good option for you. It can work both on natural gas or propane and safe to use. The price is not very high, so you do not need to panic.

If your budget allows and you need a tankless water heater with a reasonable flow rate, the Takagi T-H3-DV-N model would be a good option for you. The maximum flow rate is 10 gallons per minute and sufficient to demand a large home or an industry.

Rheem Water Heater Reviews

You should ensure before buying any heater is that affordable and valuable according to your family or home size!  Rheem water heater is one of the top names in both air and water use today that famous to provide you continuously hot water during the season. The company emphasizes customer care and quality and produces many new designs during the first century in the business.

Best 5 Rheem Tankless Water Heaters


Rheem RTEX-18 18KW

  • 4.4 GPM
  • Electric, Point of Use
  • 0.99 Energy Factor Rating


  • 3.2 GPM
  • Electric, Point of Use
  • 0.99 Energy Factor Rating

Rheem RTG-84DVLN

  • 8.4 GPM
  • Gas, Whole House
  • 0.82 Energy Factor Rating

Rheem RTGH-95XLN

Rheem RTGH-95
  • 9.5 GPM
  • Gas, Whole House
  • 0.94 Energy Factor Rating
Rheem RTG-84XLN
  • 8.4 GPM
  • Gas, Whole House
  • 0.82 Energy Factor Rating

History of Rheem

In 1925, brothers Donald and Richard Rheem water heater formed a partnership with the Pacific Galvanizing Company to grow steel drums in Emeryville California.Rheem

In 1930, the brothers were so successful that they merged the company, took both partners. It also bought the Republic Steel Package Company. Similarly, the merger added a new plant to Richmond, California. Also added new products in their warehouse, including boilers and tanks which is important for the water heaters. Finally, the company bought John Wood Manufacturing and began making gas water heaters.

Continue to the late 1940s. Rheem had contributed heavily to the war effort and was now returning to consumer goods. In Australia and Brazil, the company will continue to grow rapidly, ending in 1960 with 42 plants in 19 countries.

The company split into two phases in 1973, with the Air Conditioning Division focusing on HVAC applications. Water Heater Division is focusing on water heaters. Hence, the two components continued to improve the quality of their lines, producing highly innovative and space-saving products.

Today, the Rheem Water Heater Division has several lines of residential and commercial use that sit on the edge of technology and efficiency. Accordingly, they also produce water heaters of the Richmond type.

How Is Rheem Compare?

One of the leading water heating companies in America, Rheem manufactures heater models in solar, electric, gas, tankless, and hybrid models. But what makes this company stand out from its competition? Here are some of the things that really distinguish Rheem:


While Rheem designs countless products in its 100 years of operation. Consequently, it is currently the only company in the world that produces pool & spa heating, water heating, cooling, heating, and commercial refrigeration facilities. It is also the largest producer of water heaters in North America. So, whether you live in a family home or a shared apartment, you will definitely find a suitable water heater.

Award-winning Composition

From subsequent energy efficiency to cutting-edge technology, the company has been pioneering in building some of the most innovative and innovative developments for cooling, heating, and water heating. Boasting a number of award-winning solutions, it brings improved comfort, experience, and savings to customers.


Rheem’s waste disposal is one of the highlights of the crowd. The company looks at its impact on the environment and takes action to change and become more environmentally friendly. It promotes energy-saving products, such as the Professional Prestige series.

Features to look for

  • Guardian System to prevent the ignition of flammable vapors.
  • Flexible venting system (power, power-direct vent, or atmospheric with the powered damper).
  • The environment-friendly gas burner meets the low gas emission standards.
  • Stainless steel elements for durability.
  • Hot surface igniter for reliable work.
  • Dual anode rod system.
  • A blower with a reduced noise level.
  • Remote control or digital temperature controller.
  • Condensing technology for superior efficiency.
  • EcoNet capability.
  • Advanced electronics with the self-diagnostic program.
  • Professional-grade components.
  • Longer warranty

Rheem Water Heater Reviews

Rheem water heater reviews

The company Rheem Water heater has a wide range of types and models of almost any home size, from utility to water temperature throughout the house.

The tank type is the most popular type, and Rheem offers selected gas, electric and solar models, including heat pumps. Similarly, it comes with power from 20 to 80 liters where the best is best available and the highest quality, using advanced features and a long warranty.

Waterproof water heaters are gaining popularity due to their small size, the required temperature for hot water, high technology and “raw” technology, reduced gas emissions, and high energy savings – making it a good purchase.

Rheem Gas Water Heater Reviews 

Rheem gas heater heaters come from Professional, Performance (available only in the US), and Specialty line.

The Professional Prestige line is a highly developed team consisting of highly efficient water heaters and Energy Star tank-type units that use professional grade materials and special features, making them the best choice for you. A good example is the 50-gal RHE50 tank model, a melting unit that comes with a power of 0.82 and a First Hour Rating of 98 GPH, making it a good purchase.

The Operating Line only includes water heaters and storage water tanks and includes all shut-off options, while the Specialty line contains wireless tank type and condensing units.

Detailed reviews of gas water heaters designed for low NOx emissions, high demand, high recovery, or Energy Star can be found here.

Rheem Electric Water Heater

Very small units, such as those with a 2.5-liter storage tank are known to be used models, while whole-house houses as their name suggests, can provide plenty of hot water throughout the house.

Rheem is best known for building state-of-the-art water heaters, where the Marathon, from the Specialty line, is among the best you can buy because of its high quality, water-resistant, leaky water tank, and lifetime warranty.

Rheem Tankless Water Heater

Instead of storing water, waterless heaters without tanks use heat coils to heat water as you need them. They save much more energy than a storage tank but only provide a limited flow of hot water per minute – about 3.5 liters, depending on the water temperature.

They are ideal for people who do not usually consume water for more than one user at a time — such as showering and washing dishes at the same time.

Wireless types are preferred in households that use natural gas to heat water; electrical models may require the expensive development of domestic power.


The company Rheem Manufacturing was founded back in 1920, and hot water heaters were one of the first products.

The company bought the Ruud Manufacturing Company, which built the first self-powered electric water heater.

Today, Rheem water heaters are a well-known brand, and the company is a well-known North American manufacturer in providing complete heating solutions.

Rheem is now a wholly-owned subsidiary of Paloma Industries, the world’s largest electronics manufacturer, based in Japan. if you want to see other tankless water heater brands before purchasing, be sure to check the review page.

Rinnai Tankless Water Heater Reviews

Who likes to wait longer while bathing in hot water? I bet you’re not! In winter, the water in the tank is already cold. Therefore, it can take a long time to get warm water out of it. Finally, choosing the right water-efficient Rinnai tankless water heater can solve your problems easily and without difficulty at all.

Most of the high-quality products from the manufacturer come with excellent technology that can easily reduce the time. However, if you are looking for a new Rinnai tankless water heater, it can be difficult to choose one.

Especially since there are so many products available and so many limitations to consider! You can check out this guide at Rinnai Tankless Water Heater Reviews to find out which is the best available on the market today.

Rinnai Tankless Water Heater Reviews

Rinnai Tankless Water Heater Reviews

Rinnai Tankless Water Heater 2021


Rinnai Tankless Water Heater

  • 7.5 GPM
  • 0.82 Energy Factor Rating
  • Gas, Outdoor

Rinnai Tankless Water Heater

  • 9.8 GPM
  • 0.95 Energy Factor Rating
  • Gas, Indoor

Rinnai Tankless Water Heater

  • 9.8 GPM
  • 0.95 Energy Factor Rating
  • Gas, Indoor

Rinnai Tankless Water Heater

Rinnai V75IN 

  • 9.8 GPM
  • 0.95 Energy Factor Rating
  • Gas, Indoor
Rinnai Tankless Water Heater
  • 7.5 GPM
  • 0.82 Energy Factor Rating
  • Gas, Indoor

History of Rinnai

Rinnai Tankless Water Heater

Rinnai was founded in 1920 by Hidejiro Naito and Kanekichi Hayashi. Similarly, the company has started producing cooking stoves in Japan. In the 1930s, it expanded its production of electronics. Hence, Rinnai tankless water heater became part of the repertoire in 1964 and just 10 years later, Rinnai opened its first US office.

Consequently, every product in every type of product has a special kind of specialty. Rinnai’s specialty has higher performance than any other product. Subsequently, a pound of the equivalent model from one type of product will lose Rinnai whether the top Rinnai is one top item, or the lower end vs. the lower end (or alternatively, mid-road Rinnai vs. high end of another product type).

Tankless water heater

Accordingly, Rinnai breaks its various water heating lines into four levels of efficiency. Hence, each level has its own list of features, so it’s easy to choose a line and model that best suits your needs.

Common feature

All Rinnai tankless water heater has the same properties. Consequently, from the equivalent energy (UEF) form of .79 to .95 to the capacity to handle three or four items at a time, these units perform much better in competition. Accordingly, all current units also have Wi-Fi capability, allowing you to control settings remotely. Hence, models use propane or natural gas.

 High Success Series

The lowest category available may have a few features, but it is an excellent choice for small families. In addition the tier contains only one line, the V series.  Finally, these types can handle up to four items at a time and can carry a UEF of .79 to .82.

Top series Efficiency Plus

Along with the RL and RLX lines, this tier adds duplicate support. Similarly, they are rated with UEF of .80 to .81 and can also support four locations at the same time.

Super High-Efficiency Series

Subsequently, the third category has two lines and can support up to three items. Finally, both RUCS and RUS lines are in line with ENERGY STAR and all models have a UEF rating of .90.

A series of Super High-Efficiency Plus

Additionally, the top of the stairs has three different lines, all of which are ENERGY STAR compliant and able to regenerate energy in the body. Consequently, the RUC line has a UEF of .92, while the RU line is from the UEF of .91 to .93. At the top is the RUR line, which is .92 to .95 UEF and includes the ThermaCirc360 return pump.

Compare Rinnai models

condensing non,
Super high-efficiency
Energy Star×××YesYes
Water flow

Pros and Cons


  • A large number of models to choose from, with different sizes and designs and almost any type of home.
  • Never run out of hot water.
  • Consistent supply of hot water.
  • All Rinnai models are used for the whole house and the heat used for living and selling.
  • Condensing models come with ultra-efficiency.
  • The effect of an invisible cold water sandwich is due to the low gas temperature, similarly, the ability to work with a renewable pump.
  • Some indoor models have a built-in digital temperature controller, while others are provided with a controller.
  • Simplified troubleshooting with displayed error codes.
  • Wi-Fi is enabled.
  • Remote monitoring and diagnostics.
  • Rapid hot water delivery by recirculation.
  • Environmentally friendly design with ultra-low NOx gas emission.
  • It takes up little space, saves the wall and floor area – makes installation easier.
  • Flexible vent installation with long pipes.
  • Every part is replaced.
  • Hence, no driver light; stitching is electronic and automatic.
  • Noise level.
  • Submit a LEED certificate.
  • Improves Home Energy Rating Index scores.
  • For up to 15 years a limited warranty on the temperature changer, to be used for storage.
  • Up to 8 years warranty on Rinnai replacement parts.


  • For some buyers, even for some models, it takes a few minutes to deliver hot water (We say: depending on how far you use it), subsequently, for others, there is no real increase in time to get hot water, compared to tank-type heaters.
  • Accordingly, the LC code can be seen more often, due to the problem of calcium and hard water. (Recommended to purchase a water purification system or install the unit from time to time).
  • It is expensive to buy a reduction model (not allowing cost is too affordable).
  • Hence, hard to install.
  • The installation of technology is expensive.

How does Rinnai compare to the Competition?

The term free water technology may be new to you; however, technologies based on this technology have been used in Asia and Europe for decades now. Finally, Rinnai has continued to introduce other flawless products since its inception in 1920.

Accordingly, they are known for their high technology and innovative ideas. Here, we have noted some of the things that make it stand out from its competitors. Let’s talk about them one at a time!

Space Saving

Consequently, Rinnai is best known for providing space-saving equipment. Whether you want an indoor or outdoor water heater, Rinnai is there to work for you. Similarly, don’t just put the appliances on the wall and get a hot bath.


Unlike other end-of-life water tanks, Rinnai offers water-free water heaters that emit a small amount of CO2, making it environmentally friendly. Subsequently, all products stand out in their performance well compared to their competitors.

In fact, their less efficient model has 81% more efficiency while the best one shows more than 92%, which is quite impressive.


Additionally, Rinnai products are backed by some amazing guarantees, which make this product one of the most reliable in the market. Hence, these guarantee the reliability of the model, and the customer can use the equipment for many years without worrying about the cost of replacement often.


Unlimited access to hot water is a joy for any family. Rinnai tankless water Heater Company focuses on the quality and reliability of providing your family with nothing but the best. Hence, they ensure a warm bath for everyone without taking up too much space, save energy costs, and last longer to ensure years of operation.

In the end, every single water heater from Rinnai will give you the perfect opportunity for you and your family. Whether for trade or accommodation, 2 or 3 toilets, on a budget or not, power will always have something for you.