||British Thermal Unit. The amount of heat needed to raise one pound of water by one degree Fahrenheit.
||100 cubic feet of gas
||The amount of gas required to fill a volume of one cubic foot (under stated conditions of temperature, pressure and water vapor)
||Electricity usage equal to 1 kW of demand over a time period of 1 hour.
||1000 cubic feet of gas
||Unit of heat equivalent to 100,000 British Thermal Units (BTU's)
||The basic unit of electricity demand, equivalent to one joule per second.
||The most common unit of electricity demand, 1000 watts