Reply To: New Water Heater Help Please

The Tank New Water Heater Help Please Reply To: New Water Heater Help Please

#16848
Larry Weingarten
Participant

Hello The BTU input is part of the equation, but first hour rating combines that with the stored hot water in the tank to give a more realistic idea of how many gallons of hot water you can get in an hour. But it’s OK. My friends treat me as though I’m always confused 😀

Yours, Larry

ps. A tank starts reheating almost immediately when water is drawn as cold water hits the thermostat. So, you get both the capacity of the tank and the reheating ability of the burner. The larger the flame, the more reheating can get done. Add those two numbers together and you get first hour rating. That’s my plumber’s understanding of it 😉

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