If you're planning a DIY multi-zone mini split in 2026, Zone Air and MRCOOL...
https://sierra-wiki.win/index.php/Senville_vs_MRCOOL_DIY:_Which_One_Actually_Avoids_Refrigerant_Work%3F
If you're planning a DIY multi-zone mini split in 2026, Zone Air and MRCOOL both offer solid options with slight differences worth considering