(a) The term heating value per cubic foot shall be defined as being identical to that of total calorific value provided by the current relevant code of the American Society for Testing and Materials. It may be expressed on a wet or dry basis and so labeled. The factor for converting heating value per cubic foot on the wet basis to the dry basis at 60 degrees Fahrenheit, and the same pressure base conditions, is 1.0177. Except where noted, the wet basis of measurement is inferred in the remainder of this Part.
(b) One therm is equal to 100,000 British thermal units.
(c) Therm billing is defined as a method of billing consumers, for the actual amount of energy used, in units of therms.