MRCOOL vs Zone Air for 2026: 24 SEER2 vs 23 SEER2. The key? Is best value in...

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MRCOOL vs Zone Air for 2026: 24 SEER2 vs 23 SEER2. The key? Is best value in areas above -15°F your aim, or do you need Hyper Heat down to -22°F? Buy for your coldest nights, not the spec sheet or hype alone when choosing.