Btu
The abbreviation for British Thermal Unit. The quantity of heat required to raise 1 lbm of water from 59.5 to 60.5°F (15.2 to 15.8°C). Therefore, 1 Btu = 778.17 ft-lbf.
The abbreviation for British Thermal Unit. The quantity of heat required to raise 1 lbm of water from 59.5 to 60.5°F (15.2 to 15.8°C). Therefore, 1 Btu = 778.17 ft-lbf.