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

https://city-wiki.win/index.php/Pioneer_vs_Zone_Air_DIY_Install:_Why_Do_Some_Brands_Ship_Empty_Line_Sets%3F

If you’re planning a DIY multi-zone mini split in 2026, Zone Air and MRCOOL both offer solid options that make installation straightforward while keeping efficiency high