Historical
ANSI/ASHRAE 124-1991
Methods of Testing for Rating Combination Space-Heating and Water-Heating Appliances
Establishes a method of test to rate the performance of a combination space-heating/water-heating appliance. Covers electric, gas-fired or oil-fired combination space-heating/water-heating appliances. Dual units of measurement.
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. [ashrae]