AHRI 1500 (2015): Performance Rating of Commercial Space Heating Boilers

Standard Scope

This standard applies to gas and oil-fired steam and hot water packaged boilers, as defined in Section 3, with an input rating equal to or greater than 300,000 Btu/h, that are:


  • Steam boilers designed to operate at or below a steam pressure of 15 psig; or

  • Hot water boilers designed to operate at or below a water pressure of 160 psig and a temperature of 250 °F; or

  • Boiler designed to supply either steam or hot water, and operate under the conditions in Sections 2.1.1 and 2.1.2 of this scope.

Free Download

©2015, by Air-Conditioning, Heating, and Refrigeration Institute