2026 DIY mini split face-off: MRCOOL gives 24 SEER2; Zone Air, 23 SEER2. The...

https://wiki-planet.win/index.php/18,000_BTU_Mini_Split_for_700_Sq_Ft:_Does_That_Match_the_Rule_of_Thumb%3F

2026 DIY mini split face-off: MRCOOL gives 24 SEER2; Zone Air, 23 SEER2. The real call? Best value above -15°F, or Hyper Heat for use down to -22°F. Check winter lows before you buy: efficiency matters, but cold-weather range may matter more for your home