Fujitsu Altair 700 12,000 BTU
#13 in 12,000 BTUFull review
Very efficient and quiet, for mild winters: it stops heating below 5 °F, so a cold climate needs Fujitsu’s Orion XLTH instead.
The Fujitsu Altair 700 12,000 BTU is the better mini-split overall, rated 4.0 to 3.6. The Fujitsu Altair 700 12,000 BTU leads on cold weather and efficiency.
Fujitsu Altair 500 12,000 BTU
#18 in 12,000 BTUFull review
Fujitsu’s mainstream line for cooling and mild-winter heating, with a 10-year registered warranty. It stops heating below 5 °F.
Prices 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.
Which should you buy?
- Choose the Fujitsu Altair 700 12,000 BTU for cold weather (keeps 76% of its heat at 5 °F, heats down to 5 °F vs keeps 61% of its heat at 5 °F, heats down to 5 °F) and efficiency (11.2 HSPF2, 27.5 SEER2, COP 2.39 at 5 °F vs 10.5 HSPF2, 24 SEER2, COP 2.29 at 5 °F).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 12,000 BTU mini-split; a clear win is highlighted. How we rank explains each one.
| Factor weight | Fujitsu Altair 700 12,000 BTU | Fujitsu Altair 500 12,000 BTU |
|---|---|---|
| Overall rating | 4.0/5 | 3.6/5 |
| Cold weather 40% | 31 keeps 76% of its heat at 5 °F, heats down to 5 °F | 13 keeps 61% of its heat at 5 °F, heats down to 5 °F |
| Efficiency 30% | 100 11.2 HSPF2, 27.5 SEER2, COP 2.39 at 5 °F | 85 10.5 HSPF2, 24 SEER2, COP 2.29 at 5 °F |
| Warranty 20% | 100 10-year compressor, 10-year parts | 100 10-year compressor, 10-year parts |
| Noise 10% | 100 indoor unit from 19 dB(A) | 100 indoor unit from 19 dB(A) |
Specifications
| Fujitsu Altair 700 12,000 BTU | Fujitsu Altair 500 12,000 BTU | |
|---|---|---|
| Capacity (certified) | ||
| Size (nominal) | 12,000 BTU | 12,000 BTU |
| Cooling at 95 °F | 12,000 Btu/h | 12,000 Btu/h |
| Heating at 47 °F | 14,000 Btu/h | 14,000 Btu/h |
| Heating at 17 °F (max) | 13,200 Btu/h | 11,000 Btu/h |
| Heating at 5 °F (max) | 10,600 Btu/h | 8,500 Btu/h |
| Heat kept at 5 °F | 76% | 61% |
| Efficiency (certified) | ||
| HSPF2 (Region IV) | 11.2 | 10.5 |
| SEER2 | 27.5 | 24 |
| EER2 | 13.5 | 11.7 |
| COP at 5 °F | 2.39 | 2.29 |
| ENERGY STAR | ENERGY STAR Cold Climate | ENERGY STAR |
| AHRI certificate | 214390708 | 215212610 |
| Operating range | ||
| Heats down to | 5 °F | 5 °F |
| Cooling range | 14 to 122 °F | 14 to 122 °F |
| Installation | ||
| Installed by | Professional (sold through installers) | Professional (sold through installers) |
| Line set connection | Flare fittings (vacuum pump needed) | Flare fittings (vacuum pump needed) |
| Line set | up to 66 ft | up to 66 ft |
| Voltage | 230 V | 230 V |
| Refrigerant | R-32 | R-32 |
| Indoor unit | ASUH12KMAS | ASUH12KPAS |
| Outdoor unit | AOUH12KMAS1 | AOUH12KPAS1 |
| Build | ||
| Indoor noise | 19–42 dB(A) | 19–42 dB(A) |
| Outdoor noise | 48 dB(A) | 48 dB(A) |
| Wi-Fi | Built in | Optional module |
| Weight | indoor 22 lb / outdoor 71 lb | indoor 21 lb / outdoor 57 lb |
| Warranty | 10 yr compressor, 10 yr parts | 10 yr compressor, 10 yr parts |
| Warranty with DIY install | No, a licensed installer is required | No, a licensed installer is required |