Determine the maximum number of devices you want to run and their total flow rate.
Tankless water heater dimensions.
Measure your cold water temperature.
Then add up their flow rates gallons per minute.
And your temperature rise which is determined by your incoming water temperature subtracted from your hot water setting.
Determine your water flow rates.
I live in boston so my groundwater temperature is around 47 f.
Tankless water heaters are much smaller than units with a storage tank allowing them to be wall mounted.
In fact it is the most important part of choosing a new unit for your home.
Not only are tankless water heaters more efficient they re also convenient for installation in small spaces.
Determine the mounting space.
How to select the right size tankless water heater.
How to determine the required size of a tankless hot water heater.
Icomm elite spec sheet.
As an example i will show you what came out for me.
Most rinnai tankless water heaters are only about the size of a rolling suitcase.
Gas tankless uef electric tankless uef residential boilers.
How big is a tankless water heater.
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.
What size tankless water heater depends on your gpm at peak hot water demand.
Size matters when it comes to your tankless water heater.