British thermal unit (Btu) (BTU)
Energy
Energy Market
A British Thermal Unit is a measure of the heating value of a fuel. It is the amount of heat energy required to raise the temperature of one pound of water one degree Fahrenheit.
- — Guide to Market Oversight Glossary retrieved 2014-06-26
Renewable Energy
A unit of heat energy equal to the heat needed to raise the temperature of one pound of water one degree Fahrenheit at one atmosphere pressure (sea level).
- — ODOE Glossary of Energy Terms retrieved 2014-06-15
Science› Energy› Renewable Energy
Biomass
The amount of heat required to raise the temperature of one lb of water one degree Fahrenheit under one atmosphere of pressure and a temperature of 60-61 degrees Fahrenheit.
- — Glossary of Biomass Terms retrieved 2014-06-15