How to Install a Small Electric Tankless Water Heater

How to Install a Small Electric Tankless Water Heater

A small electric tankless water heater is an excellent choice for homeowners looking to save money on their energy bills. They can also add resale value to your home.

The upfront cost of this appliance is relatively high, but it can provide significant long-term energy savings. It also requires professional installation, which can include rerouting pipes and creating new exhaust vents.


A new electric tankless water heater can cost more than a traditional tank system, but it’s a great long-term investment that will save you money in the future. These units require minimal maintenance and can be used for years to come. The energy efficiency of a tankless water heater can also reduce your utility costs significantly.

The cost of a tankless water heater depends on several factors, including location, installation requirements, and fuel type. It is best to use a professional plumber to avoid high installation expenses, as improper installation can result in carbon monoxide leaks and other hazards. They can also help you find the right model for your home and install it properly.

Installation costs include labor, permit fees, structural changes, and removal of the old unit. These fees can be costly, especially if the new heater is in a hard-to-reach area or requires structural modifications. Some cities require a plumbing permit to install a tankless water heater, so it’s important to check with your local government before beginning the project.

Additionally, the installer may need to upgrade some electrical designs and systems to aid with the voltage requirements of your new water heater. This can run between $50 and $100 per hour. Some homes will also need to insulate the water pipes, which costs $10 per foot on average.

Energy efficiency

As they only heat water on demand, electric tankless water heaters can be much more energy efficient than conventional storage tanks. They also offer a longer lifespan than small electric tankless water heater traditional water heaters, up to twice as long as a traditional tank style unit. Plus, their comparatively small size allows them to be installed in more places than a traditional tank unit, such as in a closet or under the stairs.

When installing a new tankless electric water heater, make sure to follow the manufacturer’s installation instructions. They will provide a step-by-step approach tailored to your particular model. A qualified plumbing professional will also help ensure your home’s electrical system can support the demands of the new heater. This may include rerouting pipes, upgrading valves, and ensuring adequate ventilation. They will also ensure that the new installation complies with local building codes.

Using an electric tankless water heater can save you money in the long run, but it’s important to take steps to optimize its performance and efficiency. For example, you should install the unit as close to points of use as possible to minimize hot water loss through the pipes. Additionally, you should also try to reduce your household’s water usage as much as possible. This can be done by lowering shower times and using less water-consuming appliances, like washing machines and dishwashers.


Before starting the installation process, make sure that the circuit breaker for the heater is turned off. Moreover, it is recommended to install a new copper ground wire for safety purposes. Once you’ve made these connections, you can connect the pipes to the corresponding inlet and outlet ports on the tankless electric water heater. Use Teflon tape or pipe thread sealant to make the connections, and tighten them securely. Once you’ve made these connections, double-check them to ensure that they are leak-free.

You should also connect a flow valve to the water heater. This will allow you to shut off the hot water supply to the heater if repairs are required. Additionally, you can install a pressure valve to comply with local plumbing regulations.

Lastly, you’ll need to install a venting system to ensure proper air circulation. This step is necessary to avoid carbon monoxide poisoning, which can occur when the unit runs without enough oxygen.

Once you’ve made all of the electrical connections, you can turn on the circuit breaker for the water heater. Then, turn on the cold and hot faucets to test for any issues. In addition, it’s a good idea to flush the water lines occasionally to remove buildup and prevent clogs. This process is called bleeding the water system, and it improves efficiency and reduces sputtering.


As with any other appliance, tankless electric water heaters require regular maintenance to ensure optimal performance. This includes cleaning the inlet screen filter and checking the temperature settings. It’s also important to inspect the water connections for signs of corrosion and leakage. Leaks can be a significant problem for tankless water heaters, and can damage the house if they’re not addressed promptly.

In addition, a water heater needs to be flushed periodically. This is a simple process, and can be done electric tankless heater by hooking up a hose to the drain valve on the water heater. This removes sediment, which can cause clogs and reduce the efficiency of the unit. In some cases, you may need to do this twice a year if your home has hard water.

Besides maintenance, it’s also a good idea to check the gas lines regularly for any signs of leakage or corrosion. It’s also a good idea to test the temperature sensors and safety features to make sure they’re working properly. A professional technician can help you with these tasks, and will also be able to advise you on the best type of water heater for your needs.

Choosing the right service provider can save you money on repairs and prevent problems from occurring in the first place. Look for a company that will obtain local permits and understands your area’s building codes. Also, see if they’re transparent about their rates and warranty policies.

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