Heating Value

Heating Value. The number of British Thermal Units produced by the combustion, at constant pressure, of the amount of Gas which would occupy a volume of one (1) cubic foot at a temperature of sixty degrees (60°) Fahrenheit in the absence of water vapor and under a constant pressure of 14.73 Psia, with air of the same temperature and pressure as the Gas, when the products of combustion are cooled to the initial temperature of the Gas and air and when the water formed by combustion is condensed to the liquid... state. View More