A DIY garage mini split can help with cold days, but fit and power matter. This...

https://lilysuniquethoughtss.urbanvellum.com/posts/what-happens-if-i-undersize-a-garage-mini-split

A DIY garage mini split can help with cold days, but fit and power matter. This guide checks a 23.0 SEER2 unit, a 15A breaker, insulation, and winter limits, so you can plan the work and avoid a costly mismatch before you buy.