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

Subjects:

Mechanical Engineering