A quick-connect unit with one of the longest warranties for a self-install, priced below MrCool’s DIY 5th Gen. Its −4 °F heating limit rules it out as the only heat in a very cold climate.
Price checked October 21, 2026. As an Amazon Associate we earn from qualifying purchases.
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
| Capacity (certified) | |
|---|---|
| Size (nominal) | 12,000 BTU |
| Cooling at 95 °F | 12,000 Btu/h |
| Heating at 47 °F | 12,000 Btu/h |
| Heating at 17 °F (max) | 9,300 Btu/h |
| Heating at 5 °F (max) | 9,200 Btu/h |
| Heat kept at 5 °F | 77% |
| Price per 1,000 Btu/h at 5 °F | $187 |
| Efficiency (certified) | |
| HSPF2 (Region IV) | 9.5 |
| SEER2 | 22 |
| EER2 | 12.2 |
| COP at 5 °F | 1.90 |
| ENERGY STAR | ENERGY STAR Cold Climate |
| AHRI certificate | 216498643 |
| Operating range | |
| Heats down to | -4 °F |
| Cooling range | 5 to 115 °F |
| Installation | |
| Line set connection | Quick-connect (no vacuum pump) |
| Line set | 25 ft included |
| Voltage | 115 V |
| Refrigerant | R-454B |
| Indoor unit | 4PAMSHQCW12 |
| Outdoor unit | 4PAMSHQCO12 |
| Build | |
| Wi-Fi | Built in |
| Room size (maker) | up to 500 sq ft |
| Weight | indoor 18.8 lb / outdoor 77.2 lb |
| Warranty | 7 yr compressor, 7 yr parts |
| Warranty with DIY install | Yes |
| Released | 2025-09 |
For cold-climate homes where a quick-connect install matters more than price: it holds its full heat far colder than other quick-connect units. Flare-connect units match its cold-weather output for much less.
Amazon $2,532 MRCOOL DIY Direct $2,557For someone who wants a true plug-together install with no tools beyond a drill, and a warranty that survives it. Expect to pay well over the price of a flare unit with the same cold-weather output.
Amazon $1,759 MRCOOL DIY Direct $2,370A middle step between MrCool’s Select and DIY 5th Gen: quick-connect and a fair warranty, but it loses much of its heat in a cold snap. Best for mild winters.
MRCOOL DIY Direct $1,599Compare the Perfect Aire 4th Gen Quick Connect 12,000 BTU 115V with any other DIY mini-split →
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