Fujitsu’s mainstream line for cooling and mild-winter heating, with a 10-year registered warranty. It stops heating below 5 °F.
No store we check sells it online; the maker lists where to buy or who installs it.
The rating comes from 4 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) | 24,000 BTU |
| Cooling at 95 °F | 22,000 Btu/h |
| Heating at 47 °F | 24,000 Btu/h |
| Heating at 17 °F (max) | 24,300 Btu/h |
| Heating at 5 °F (max) | 20,000 Btu/h |
| Heat kept at 5 °F | 83% |
| Efficiency (certified) | |
| HSPF2 (Region IV) | 10 |
| SEER2 | 21.5 |
| EER2 | 11.7 |
| COP at 5 °F | 2.13 |
| ENERGY STAR | ENERGY STAR Cold Climate |
| AHRI certificate | 215441047 |
| Operating range | |
| Heats down to | 5 °F |
| Cooling range | 14 to 122 °F |
| Installation | |
| Installed by | Professional (sold through installers) |
| Line set connection | Flare fittings (vacuum pump needed) |
| Line set | up to 98 ft |
| Voltage | 230 V |
| Refrigerant | R-32 |
| Indoor unit | ASUH24KPAS |
| Outdoor unit | AOUH24KPAS1 |
| Build | |
| Indoor noise | 31–51 dB(A) |
| Outdoor noise | 55 dB(A) |
| Wi-Fi | Optional module |
| Weight | indoor 28 lb / outdoor 86 lb |
| Warranty | 10 yr compressor, 10 yr parts |
| Warranty with DIY install | No, a licensed installer is required |
The best value for heating through a cold winter, if you can pull a vacuum yourself or pay someone to. It holds its full rated heat at 5 °F for far less than a quick-connect unit that does the same.
Amazon $2,249.96 Della $2,249.96Full rated heat in deep cold at a fair price, for a self-installer comfortable with a vacuum pump. Della’s Optima Pro has near-identical certified ratings for a little less.
Amazon $2,298 Pioneer Mini Split store $2,323For 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 MRCOOL DIY Direct $3,335Compare the Fujitsu Altair 500 24,000 BTU with any other mini-split →
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