|Posted by jimbo on April 13, 2004 at 10:18:41:|
|In response to first hour delivery rate|
: The issue here is the term called the First Hour Delivery Rate for a water heater. You start with a tank full of hot water, then as you use water cold water enters the tank, tending to cool the water; then the burner kickes in so you have recovery of hot water.
The formula for first hour delivery is:
tank gallons X .7 + recovery
So your first hour is 50 x .7 + 40 = 75 gallons
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