The Perfect Aire 4th Gen Quick Connect 18,000 BTU 230V rates 4.1 among 18,000 BTU DIY mini-splits; the Perfect Aire 4th Gen Quick Connect 12,000 BTU 115V rates 3.5 among 12,000 BTU ones. The Perfect Aire 4th Gen Quick Connect 12,000 BTU 115V costs $261.83 less ($1,719.99 vs $1,981.82).
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.
Amazon $1,981.82A 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.
Amazon $1,719.99Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
These two sit in different size classes (18,000 BTU and 12,000 BTU), and each is scored against the reference points for its own class, so a rating says how well each does among its own size peers. How we rank explains each factor.
| Factor weight | Perfect Aire 4th Gen Quick Connect 18,000 BTU 230V | Perfect Aire 4th Gen Quick Connect 12,000 BTU 115V |
|---|---|---|
| Overall rating | 4.1/5 | 3.5/5 |
| Value 35% | 87 $110 per 1,000 Btu/h of heat at 5 °F | 65 $187 per 1,000 Btu/h of heat at 5 °F |
| Cold weather 25% | 73 keeps 100% of its heat at 5 °F, heats down to -4 °F | 46 keeps 77% of its heat at 5 °F, heats down to -4 °F |
| Efficiency 20% | 53 10 HSPF2, 21 SEER2, COP 1.90 at 5 °F | 48 9.5 HSPF2, 22 SEER2, COP 1.90 at 5 °F |
| Warranty 15% | 78 7-year compressor, 7-year parts | 78 7-year compressor, 7-year parts |
| Noise 5% | 50 indoor noise not published (neutral score used) | 50 indoor noise not published (neutral score used) |
| Perfect Aire 4th Gen Quick Connect 18,000 BTU 230V | Perfect Aire 4th Gen Quick Connect 12,000 BTU 115V | |
|---|---|---|
| Capacity (certified) | ||
| Size (nominal) | 18,000 BTU | 12,000 BTU |
| Cooling at 95 °F | 18,000 Btu/h | 12,000 Btu/h |
| Heating at 47 °F | 18,000 Btu/h | 12,000 Btu/h |
| Heating at 17 °F (max) | 18,500 Btu/h | 9,300 Btu/h |
| Heating at 5 °F (max) | 18,000 Btu/h | 9,200 Btu/h |
| Heat kept at 5 °F | 100% | 77% |
| Price per 1,000 Btu/h at 5 °F | $110 | $187 |
| Efficiency (certified) | ||
| HSPF2 (Region IV) | 10 | 9.5 |
| SEER2 | 21 | 22 |
| EER2 | 12.9 | 12.2 |
| COP at 5 °F | 1.90 | 1.90 |
| ENERGY STAR | ENERGY STAR Cold Climate | ENERGY STAR Cold Climate |
| AHRI certificate | 216498646 | 216498643 |
| Operating range | ||
| Heats down to | -4 °F | -4 °F |
| Cooling range | 5 to 115 °F | 5 to 115 °F |
| Installation | ||
| Line set connection | Quick-connect (no vacuum pump) | Quick-connect (no vacuum pump) |
| Line set | 25 ft included | 25 ft included |
| Voltage | 230 V | 115 V |
| Refrigerant | R-454B | R-454B |
| Indoor unit | 4PAMSHQCW18 | 4PAMSHQCW12 |
| Outdoor unit | 4PAMSHQCO18 | 4PAMSHQCO12 |
| Build | ||
| Wi-Fi | Built in | Built in |
| Room size (maker) | up to 750 sq ft | up to 500 sq ft |
| Weight | indoor 33 lb / outdoor 97 lb | indoor 18.8 lb / outdoor 77.2 lb |
| Warranty | 7 yr compressor, 7 yr parts | 7 yr compressor, 7 yr parts |
| Warranty with DIY install | Yes | Yes |
| Released | 2025-09 | 2025-09 |
