Heat of The Liquid : The increase in total heat (Enthalpy) per pound of a saturated liquid as its temperature is increased above a chosen base temperature. (Usually: 400F for refrigerants). It is expressed in BTU's.
EESiFlo North America, Terminology and Glossary: HVAC Terms, Pennsylvania, USA 2002. flowmeterdirectory.com/flowmeter_terminology, (Heat, Vent and Air Cond - Amer) {553}