If you’re tackling a DIY multi-zone mini split this year, Zone Air and MRCOOL...
https://telegra.ph/If-My-Line-Run-Exceeds-50-Feet-What-Are-My-Options-Besides-Couplers-09-27
If you’re tackling a DIY multi-zone mini split this year, Zone Air and MRCOOL offer solid options that balance efficiency and ease of install