Heat. Heating water is 19% on avergae, and heating your home is 51%. The good news is space heating dropped by 15% over the last 20 years. Global Warming? Probably insulation.
For your information, Btu is short for British thermal unit, an British standard unit of energy. One Btu is equal to the amount of heat required to raise the temperature of one pound of liquid water by 1 degree Fahrenheit at its maximum density, which occurs at a temperature of 39.1 degrees Fahrenheit. One Btu is equal to approximately 251.9 calories or 1055 joules. The heat output of computer devices is often expressed in Btu’s.
I want to thank the DOE for these great statistics! They have a lot of great energy trends available over time.
