How to Install a Tankless Water Heater – FAQs, Sizing and More

How to Install a Tankless Water Heater

Tankless Water Heater, Before buying and installing the tankless water heater in your household. Think about whether you would want a traditional water heating system. You could rely on it throughout the year without worrying how many appliances are using the hot water. Also whether the heater will be strained.

How to Install a Tankless Water HeaterOverall, tankless water heaters have been around for decades and are much easier to use plus with tankless water heaters you would not have to worry about maintaining a stand-alone heating system which would involve flushing the tubes and cleaning the heating coil, to say the least.

Moreover, with tankless water heaters, you would only have to do turn on the hot water tap and you wouldn’t have to wait for the water boiler to heat the water.

Tankless Water Heater

Sadly, with tankless water heaters, you have less control over the temperature of the water coming out of the hot water tap.

Obviously, if you have a large home and family then you might want to look for a larger tankless water heating system that will be able to meet your needs.

Furthermore, tankless water heaters are great because they only produce hot water when it is needed thus they are very energy-efficient because no heat energy is wasted.

Tankless water heaters are often called demand-type water heaters as they don’t have the large hot water reservoirs that conventional water heaters come with.

Moreover, they are fairly easy to maintain as they come with a very simple working mechanism. This is how electric tankless water heaters work:

What Mold Needs to Grow
  • The user turns the hot water tap on
  • Cold water begins to flow the pipe system, it is heated as it passes the heating coil in the middle of the tank
  • Hot water flows from the tap
Some older models of tankless water heaters used gas burners instead of the modern heating coil mechanism. Older models were not very safe because of their use of gas whereas newer models have been tested and certified.

Read Our Buying Guide

How Much Hot Water Can Tankless Water Heaters ProduceHow Much Hot Water Can Tankless Water Heaters Produce

On average, tankless water heaters produce about 12-15 liters of hot water per minute whereas tankless water heaters with gas burners are capable of producing about 20-22 liters of how water per minute.

Of course, with tankless water heaters you will need to pay careful attention to how many individuals use the hot water at once as well as how many appliances rely on the hot water.

For example, if you are planning on setting the washing machine and the dishwasher at once be prepared that these two electronic appliances will have to share the hot water supply and thus the tankless water heater might be overwhelmed.

Some individuals with two-story homes prefer to install two tankless water heaters, one on each floor to solve this problem.

How to Clean Tankless Water Heaters

Another thing that a potential buyer of tankless water heater will need to definitely to look at is how easy the tankless heater will be to clean especially the heating coil which is located inside the tank and can be very hard to reach.

Electric tankless water heaters with porcelain and ceramic finishes are great because dust and dirt particles are less likely to stick to them hence they can be easily cleaned with little effort and mild soap solution. But, they can be easily scratched and scuffed so you should be careful when where you place them.

Also, it might make sense to regularly check the tankless water heater for any damages and leaks as any problem that is immediately spotted will be easier to rectify than one that has been left for a long period of time unattended.

Lastly, always look for the best tankless water heaters that come with warranty and clear instructions on how to clean and maintain it as this will ensure you will not have a hard time setting up the heater while the manufacturers’ warranty will protect from any damages the heater might sustain during use in your household.

How to Install Tankless Water Heaters

The installation of tankless water heaters will depend on a number of factors such as;

What Mold Needs to Grow
  • Model and type of tankless water heater
  • Where you are installing it
  • Building code of your state or county
  • State of your plumbing
Once you decide to install the tank yourself, make sure to contact the manufacturer as to clean all your questions. Carefully read the instruction manual and maybe even watch a few videos. Some states will require you to obtain a special permit to install tankless water heaters.

The electric tankless water heater is very easy to install compared to the conventional heaters plus you will need to decide where you want it to be placed then proceed to actually put it there.

When the electric tankless water heater will be in place, you will need to insert the electrical plug into the electric socket. Therefore, you will need to mount and install the tankless water heater somewhere close to an electric socket.

Furthermore, consider models of tankless electric water heaters. That you could take with you anywhere even if you move apartments or houses.

With an electric tankless water heater, you would not have to worry about checking the gas burner. Otherwise the gas pipes for leaks because you would only need to turn the water tap on and thats all.

How Much Do Tankless Water Heaters Cost

Tankless water heaters cost a little more than regular water heaters with tanks. However, the latter will turn out much more expensive. Also, in the long run because they mainly heat up to 100 liters of water. Then gets to sit and cool down over time only for heat it up again whenever you need to use it.

Furthermore, tankless water heaters have been proven to be much more energy-efficient and require far less maintenance. Plus, their spare parts can be easily bought and replaced with little to no effort.


In conclusion, remember the basic and logical steps to installing anything new in your house. Firstly, if you already have a water heater then you would need to remove it.

If you don’t, then you would need to prepare the desired area by following the steps mentioned above. Mark all the necessary spots to drill and screw using a marker. Think about covering the pipes with many solutions that are now available.

Once, you have installed the new tankless water heater make sure to compress the air inside. Also the pipes by turning it on an opening the hot water tap. To avoid any confusion with the right size of wire gauges. Also, breakers, call the manufacturer or check your local building code.

Once you have installed the tankless water heater and ensured that everything is correctly connected. Turn on the breaker and see what the standby mode reads. If it says OK or lights with green color. Set the needed temperature and open the hot water tap to see if the water coming of it is warm.

If not, you will have to troubleshoot to see what and where went wrong. So that you could reconnect all the connections and fix the problem.

Jessica Avila

Jessica Avila is a Home Improvement content writer, I am well-versed in a wide range of topics within the industry. I will help you specially Dining and Drawing area.

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