Background

Hot Water Facts

 

USA Building Data from ASHRAE and the Web

for Canada ÷ 10

Calculations used:

1 British Thermal Unit (Btu) raises the temperature of 1 pound of water 1 °F

1 liter of water weighs 2.204684 pounds.

1 liter raised 63°F = 138 Btu @ avg. 76% efficiency= ~200 Btu)

100,000 Btu = 1 Therm @ ~$1.42 US