If you’re thinking about a DIY multi-zone mini split, Zone Air and MRCOOL stand...
https://wiki-canyon.win/index.php/MRCOOL_DIY_Hyper_Heat_-22%C2%B0F:_Why_Isn%27t_It_Common_in_Multi-Zone_Kits%3F
If you’re thinking about a DIY multi-zone mini split, Zone Air and MRCOOL stand out for practical reasons