For 2026, MRCOOL’s 24 SEER2 beats Zone Air’s 23 SEER2 on efficiency. The real...

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

For 2026, MRCOOL’s 24 SEER2 beats Zone Air’s 23 SEER2 on efficiency. The real choice: MRCOOL for best value above -15°F, or Zone Air Hyper Heat for heating down to -22°F.