In 2026, the best DIY cold-climate mini splits offer up to 24 SEER2 efficiency...
https://www.grandmashousediy.com/best-diy-cold-climate-mini-split-hyper-heat-models-compared-mrcool-vs-cooper-hunter-vs-zone-air-2026/
In 2026, the best DIY cold-climate mini splits offer up to 24 SEER2 efficiency and reliable heating down to -22°F, perfect for harsh winters