ASHRAE STD 124 2007 Edition, January 27, 2007
METHODS OF TESTING FOR RATING COMBINATION SPACE-HEATING AND WATER-HEATING APPLIANCES
Includes all amendments and changes through Errata , February 14, 2011
This test method is intended to cover electric, gas-fired, and oil-fired combination space-heating and water-heating appliances.
This standard covers appliances up to 300,000 Btu/h (87.9 kW) rated input.
The purpose of this standard is to establish a method of test to rate the performance of a combination space-heating and water-heating appliance.