Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
AHRI Standard 210/240 uses SEER as the performance rating metric for air-cooled heat pumps up to 65,000 Btu/h (~5.4 tons).
AHRI Standard 340/360 uses EER as the (full-load) performance rating metric for air-cooled heat pumps up to 250,000 Btu/h (~20 tons).
EER is also used for water-source heat pump cooling efficiency as defined in ISO 13256-1 and 13256-2.
