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British Thermal Unit

The amount of heat required to raise the temperature of 1 lb of water by 1 degree Fahrenheit. Normally taken as 60° to 61°F.

Conversions
1 Btu	=	1055.06 J		1 Btu	=	252 calories
1 Btu	=	778.2 ft lbf		1 therm	=	1x10⁵ Btu
1 Btu	=	2.928 x10^-4 kWh		1 J	=	1 Nm

See also: Therm.

Subjects: Heating Ventilation and Air Conditioning Units