re: Heating and cooling - mini split

I’ve had Mitsubishis and LGs. They’re both fine. Our LGs have been slightly more fiddly than the Mitsus, but they also have a electrostatic filter function which is great when California catches on fire and pollutes our air.

If you’re going to have a head-unit in / near your shop, you’ll need to keep the dust out of it. Mini-split filters are entirely unsuited to sawdust. That can be as simple as a box built over the split to keep the dust out of the coils.