AHRI 270: Sound Performance Rating of Outdoor Unitary Equipment

This standard establishes definitions, test requirements, rating requirements, minimum data requirements for published ratings, marking and nameplate data, and conformance conditions for outdoor unitary equipment.

AHRI 270 applies to the outdoor sections of factory-made air-conditioning and heat pump equipment as defined in AHRI 210/240, AHRI 340/360 (cooling capacity ratings of equal to or less than 40 kW (135,000 BTU/hr), AHRI 1230, AHRI 1160 (I-P), and AHRI 1161 (SI). Products covered include air-source unitary heat pumps, heat pump pool heaters, unitary air-conditioners, and variable refrigerant flow (VRF) systems.

AHRI 270-2025 (SI/I-P) Sound Performance Rating of Outdoor Unitary Equipment

AHRI 270 (2015): Sound Rating of Outdoor Unitary Equipment (with Addendum 1)

© 2025, by Air-Conditioning, Heating, and Refrigeration Institute