If you’re thinking about a DIY multi-zone mini split in 2026, Zone Air and...

https://foxtrot-wiki.win/index.php/Zone_Air_Cut-to-Length_Line_Sets:_How_Do_I_Measure_the_Run_Correctly%3F

If you’re thinking about a DIY multi-zone mini split in 2026, Zone Air and MRCOOL both have solid options that make sense for older homes