Heat pumps, geothermal and AC
2026 Heat Pump Buyers Guide for Homeowners and Professionals
...SEER2 and HSPF2 are the mandatory standards for testing.
SEER2 (Seasonal Energy Efficiency Ratio 2): Measures cooling efficiency. A rating of 18 to 22 SEER2 is considered high-performance.
HSPF2 (Heating Seasonal Performance Factor 2): Measures heating efficiency over a season. For 2026, look for units with an HSPF2 o...
