Tankless Water Heater Closet Size

The international residential code irc specifically bans a storage closet as a location for a gas water heater.

Tankless water heater closet size.

Tankless water heaters are rated by the maximum temperature rise possible at a given flow rate. For example you might not be able to run more than one shower at a time without someone getting an arctic blast of cold water. Electric units have measurements in the 10 inch high to 7 inch. Yes a gas water heater can be installed in a closet as long as the closet is not used for storage.

Therefore to size a demand water heater you need to determine the flow rate and the temperature rise you ll need for its application whole house or a remote application such as just a bathroom in your home. Size matters when it comes to your tankless water heater. In fact it is the most important part of choosing a new unit for your home. As an example i will show you what came out for me.

And your temperature rise which is determined by your incoming water temperature subtracted from your hot water setting. Having a water heater that is too small will result in it not being able to produce enough hot water for your household demand. Traditional water heaters can take up to 16 square feet of valuable floor space. What size tankless water heater depends on your gpm at peak hot water demand.