Oct 09, 2020 - 06:56 AM
- Starting water temperature
- Ending water temperature
- Efficiency of the water heater
The 6 gallon hybrid unit is 425 watts or 1450 btu's. It takes 8.33 btu's to heat 1 gallon of water 1 degree F. So to leave out any calculations it would take about 2.3 hours to heat 6 gallons of water from 60 degrees to 120 degrees F.