For 2026, MRCOOL’s 24 SEER2 is the value pick for temperatures above -15°F....

https://threadvistax.com/s/d0qjBPP0Sv7v-dkk2Hq5X

For 2026, MRCOOL’s 24 SEER2 is the value pick for temperatures above -15°F. Zone Air’s 23 SEER2 trades a point of efficiency for Hyper Heat down to -22°F. Choose based on your winter lows.