centigrade heat unit
centigrade heat unit[′sent·ə‚grād ′hēt ‚yü·nət]
A unit of heat energy, equal to 0.01 of the quantity of heat needed to raise 1 pound of air-free water from 0 to 100°C at a constant pressure of 1 standard atmosphere; equal to 1900.44 joules. Symbolized CHU; (more correctly) CHUmean.
The amount of heat required to raise one pound of water one degree centigrade.