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Posted on November 26, 2012
Now that you decided to ditch the 'ol tank and install a tankless water heater, you're probably questioning, "what size water heater do I need?" Finding the size tankless water heater that is suitable for your needs is as easy as 1-2-3!
Here's some helpful lingo:
Flow Rate -- the amount of hot water that comes out of the tankless water heater.
Gallons per Minute (GPM) -- the amount of hot water the tankless water heater produces per minute. Or the measurement of flow rate.
Pounds per Square Inch (PSI) -- the water pressure or the amount of pressureneeded to force the water through the pipes. The higher the PSI, the higher the GPM.
Delta T -- the change in temperature.
Temperature Rise -- the temperature difference between incoming ground water temperature and the source for hot water.
Tools you'll need:
Now, let's begin.
Ground Water Temperature - Desired Temperature at Showerhead= Temperature Rise