Heat pumps, geothermal and AC
2026 Heat Pump Buyers Guide for Homeowners and Professionals
...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 of 9 or higher.
COP (Coefficient of Performance): A real-time measurement o...
