The Best 110V Mini Splits

Why the Rellytech 12 won

The Rellytech 12,000 BTU 20 SEER2 won the "best 110v mini split" search by combining the top efficiency rating with 750 sq ft coverage and a cold-weather operating range down to -13°F, all on 115V power.

1. Top-tier 20 SEER2 efficiency. The Rellytech is rated 20 SEER2, matching the Pioneer and Costway, and above the Albott's 18 SEER2 and the Rellytech 11,500 BTU's 17 SEER2. the maker says it is 30% more energy-efficient than standard 17 SEER2 models.
2. Covers up to 750 sq ft. Its 750 sq ft coverage ties the Albott and Costway as the highest in this group, and is well above the Rellytech 11,500 BTU's 550 sq ft and the Pioneer's 350 to 500 sq ft range. That makes it the strongest choice for larger rooms among these picks.
3. Wide operating range and smart controls. the maker says it works from -13°F to 122°F, a lower cold-weather floor than the Pioneer's -4°F and the 11,500 BTU's -4°F heating limit. It also adds Wi-Fi and voice control, which none of the other listed picks mention in their features.

Why not the others

• Albott 12,000 BTU SEER2 18 Mini Split: The Albott has the same 750 sq ft coverage and a longer 5-year compressor warranty, but its 18 SEER2 rating is lower, so choose it if you want the warranty and a quieter unit below 29 dB over the highest efficiency.
• Costway 12,000 BTU 20 SEER2 Mini Split: The Costway matches the Rellytech on efficiency and coverage and has an 8-year compressor warranty, but the listing does not mention Wi-Fi control, so pick it if you do not need smart features.
• Pioneer 12,000 BTU Diamante Pro Mini Split: The Pioneer matches the 20 SEER2 rating and includes a full installation kit, but it is recommended for only 350 to 500 sq ft and heats only down to -4°F, so choose it for a smaller room.
• Rellytech 11,500 BTU Quiet Mini Split: The quiet model runs at 29 dB and is lighter on coverage at 550 sq ft with a 17 SEER2 rating, so choose it if quiet operation in a smaller space matters most.

Bottom line: Buy the Rellytech 12,000 BTU 20 SEER2 if you want high efficiency, 750 sq ft coverage and smart control on 115V power, and you can hire a licensed HVAC technician to install it. Look elsewhere if you want the longest warranty (the Costway and Albott list longer compressor coverage) or a smaller, quieter unit.