Tackling a 3-zone DIY mini split lets you control comfort in multiple rooms...

https://high-wiki.win/index.php/MRCOOL_vs_Zone_Air_for_Cold_Climates_Below_0%C2%B0F:_What_You_Need_to_Know

Tackling a 3-zone DIY mini split lets you control comfort in multiple rooms without sky-high energy bills. Most systems boast a solid SEER2 rating around 24, keeping your electricity use in check