How to install tankless water heater

In the winter season mostly people want to use water heaters. Now day’s tankless water heaters are useful for residential and commercial areas. In the same way, how to install tankless water heater provides endless hot water as it instantly boils water through the unit. The idea of having an unlimited supply of hot water is very inspiring for homeowners.

How to install tankless water heater


A tankless water heater, also called a required water heater, saves money because it does not store a large amount of hot water. What you do is provide hot water on demand so you don’t have to worry about the shower getting cold suddenly. Now here we discuss how to install tankless water heater.

But there is one caveat: Because a non-tank water heater heats water in real-time as water passes through this unit, it can burn the amount of water supplied at one time. Because of this, it may not work in a home where there are two or three showers at the same time. The number of hot water pipes that can operate simultaneously will depend on the heating capacity of the unit.

How to install tankless water heater guidelines

As more and more plumbers begin to incorporate this technology, which can save their customers up to 40% on energy costs compared to storage tank options, the need for proper installation guidelines will be greater than ever before.

There are a couple of basic options:

  • A tankless cooled water heater is vented outside. It also requires a gas line and a 120-volt circuit connection. It is plugged into an outlet or plugged directly into the service panel.
  • An indoor, water-free tank heater, which does not need to be ventilated. It requires 240-volt power.

Steps for installation

  1. Installations such as this, including pipe installation, are best left to a licensed, qualified plumber.
  2. Turn off the water and gas in the hot water tank. Drain the water from the tank and remove the old tank.
  3. A new water heater may require a large gas line, which is needed to move from the gas meter to the water heater.
  4. Using a hole saw, drill a hole in the outside of the house near the water heater area. Run the PVC cooling pipes in and out of the hole.
  5. Connect the cold water line to the water heater and the hotline out of the heater using a copper pipe ¾”.
  6. The much-needed water heater needs an electrical outlet. The electrician may need to help add one near the installation site.
  7. A crossover valve is installed in the leading pipeline repair area to allow a built-in recycling pump to keep the hot water ready.
  8. Turn on the cold water supply, gas supply, and power in the water heater and test.

Water Heater Installation Cost (2020)

Clean, hot water is still a comfort to almost every home. While the demand for hot water in the house does not change, the way it burns does not change, with various tanks and fuel sources available to homeowners. Whether you are buying a new home water heater or installing a broken one, it is important to understand the types of water pipes you can get and how much they cost.

Tank vs. Tankless Water Heater

Tank and non-tank water heaters are the two most popular types of hot water heaters.

Tankless Hot Water Heater installation

Water storage tank heaters are a popular option for homeowners, which hold and heat liters of water. Water heaters are installed invisible way, usually in a garage, basement, or cabinet. To heat water, tank water heaters usually use electricity or natural gas.

Water storage tank heaters are easier to install than non-tank tanks, which require approximately three hours of operation. Established as a simply easy-to-install water heater, storage tank heaters are more expensive than non-tank systems, operating between $ 820- $ 1,290.

Although a less expensive option, tank heaters are less energy efficient because they are always running to maintain the desired tank temperature. As a result, these tanks have high utility bills and a short lifespan.

Tankless Water Heaters

Wireless water heaters work by heating water as needed. The system uses a gas or electric heater to heat a water pipe, supplying water on demand.

Inexpensive water heaters have a higher initial price compared to tank heaters, which cost homeowners about $ 1,200- $ 3,500. The high cost is the result of a power setup of many workers. As new gas and water cables are required which are installed.

For temperatures without electrical tanks, new electrical wiring will need to be installed. Although the installation of wireless heaters is less expensive than traditional models, they are more efficient and perform lower energy costs than their counterparts. In addition, these water heaters last longer, with a normal life of about 20 years.

Gas and Electric Water Heater

Gas and electric types are available in waterless heaters and tanks, each offering homeowners different advantages and disadvantages.

Electric tankless water heater installs

An electric tank is less expensive to buy and install than a fuel tank, with a 50-liter water heating tank costing about $ 500. However, the total cost of the monthly operation is often more expensive than that of gas heating.  The bad thing about a very dangerous electric heater is that when the power goes out, the hot water also runs out. Electric tankless water heater installation is very easy for professionals.

Tankless Gas Water Heater installation

Gas heaters are very expensive to buy for about $ 700 with a 50-liter tank. However, the operating costs of these heaters are less than the electric model. Although natural gas can be very hot or leaky, the gas model provides hot water without electricity. The worst thing about a gas water heater is its environmental damage by emissions.

Aspects of tankless water heater installation

As more and more plumbers begin to incorporate this technology, which can save their customers up to 40% on energy costs compared to storage tank options, the need for proper installation guidelines will be greater than ever before.

Unit Selection for install tankless water heater

The type of tankless water heater selected for any given application will depend on the incoming water temperatures and construction application patterns. Now select the unit for how to install tankless water heater.

The first step is to determine the temperature rise – the required hot water temperature removes the temperature of the groundwater table or Delta T. This figure will show how hard the water heater should work to provide the hot water you apply.

Next, find the maximum amount of hot water. Installing tankless water heaters are different from tank-type models in that they are able to provide continuous hot water – no storage will run out. It is important to calculate the maximum amount of hot water used at any one time.

Gas Supply for how to install tankless water heater

Typically, tankless water heaters will use a higher amount of gas than their tank counterparts to meet the sudden demand for hot water without storage. The installer must ensure that the building has sufficient gas pressure to allow the unit to meet all the gas requirements of the building. If in doubt, contact your gas station to confirm the correct size of the meter.

A standard non-tank water heater will require an inch-by-line gas line. However, there are enough pressure and the running length is short enough. It is possible to use an ½-inch line, which is used by most water tanks-type heaters.

The ability to use an existing gas line allows for quick, inexpensive installation when replacing a tank unit with a non-tank model. But make sure you respond with all equipment that uses this line, not just a water heater. Applicants must also verify with their local gas company line size and licensing rules and codes.

Spiritual Needs for installing tankless water heater

As with any water heater, a waterless unit requires a sufficient amount of incoming air for the fire system to function properly. Many units are fired directly, taking fire from outside. Some are installed outside, depending on the weather. In both cases, there is a complete digestive tract. In fact, if the air in the fire is severe, direct or external openings should be considered. Here we discuss spiritual needs for how to install tankless water heater.

The size of the open-air vent – from inside or outside – is based on the installation of a non-tank unit. How to install tankless water heater depends on the size of the heater.

If the heater is blowing air out, the required opening is approximately 1 inch square at 4,000 Btu / h.

 Temperature Settings

Generally, shower temperatures are 104 ° -106 ° F. As a result, a waterless water heater should not be set above 115 ° -120 °. The known temperature in the whole country where frostbite is most likely to occur is 125 ° F.

Unlike the final tank-type water heater is a trap with the growth of bacteria in Legionnaires. Waterless heaters do not store hot water. In fact, they continue to purify any internal water by all means. Because of this, there is no reason for hygiene to maintain a high temperature; The only reason is user comfort.

Water Quality

Water quality is very important for all water equipment, and water heaters will be severely affected. Most notable is the weight of the water, which is a measure of the minerals (magnesium and calcium) it contains.

When heated, these minerals normally flow out and form crystals, called lime scales, which can cover the pipe. The lemon scale acts as a protector, reducing the efficiency of heat transfer. It is increasing heat stress, which can ultimately reduce the time of the water heater.

Steps can be taken to remove the lime scale regularly through a process called descaling. In which the vinegar is removed with water heater coils to remove the buildup. Finally, it is important to know the quality of local water and take steps to treat the water or establish a remediation plan.


Here we discuss how to install tankless water heater in your home it is not a luxury. Instead, this is the perfect need for your family and yourself for the winter. So before installing a water heater, you need to know everything nitty-gritty about it.