As an example i will show you what came out for me.
Tankless water heater closet size.
Tankless water heaters are about the size of a carry on suitcase and can be installed on virtually any wall inside or outside of your home.
Determine the mounting space tankless water heaters are much smaller than units with a storage tank allowing them to be wall mounted.
Tankless water heaters are rated by the maximum temperature rise possible at a given flow rate.
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.
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.
I live in boston so my groundwater temperature is around 47 f.
What size tankless water heater depends on your gpm at peak hot water demand.
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.
Yes a gas water heater can be installed in a closet as long as the closet is not used for storage.
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.