Rinnai Tankless Water Heater Reviews

Explore without worrying.

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
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
  • 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
  • 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.