Reviews
Hands-on-informed reviews of individual DIY mini split systems and brands — rated on efficiency, cold-weather heat, noise, DIY-friendliness, and warranty.
Last reviewed July 5, 2026
MRCOOL's current flagship — R-454B, built-in WiFi, up to 23.6 SEER2. Specs, price, and our verdict for 2025–2026.
Is the MRCOOL DIY 4th Gen still worth it in 2026? Our full review and verdict.
See how the top DIY mini splits rank, or shop our #1 pick.