According to SEER2.com, “residential central air systems below 45,000 BTU (British Thermal Units) must have a SEER2 rating of 13.4 (14.0 SEER). Residential central air systems 45,000 BTU and above must have a SEER2 rating of 13.4 (14.0 SEER) as well. In addition, heat pumps in any region must meet 14.3 SEER2 (15.0 SEER) and 7.5 HSPF2 (8.8 HSPF) requirements.
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