Fujitsu Orion XLTH+ 12,000 BTU
#2 in 12,000 BTUFull review
Fujitsu’s top cold-climate unit and among the most efficient here: it makes far more than its rated heat at 5 °F and heats to −22 °F. Sold only at 9,000 and 12,000 BTU.
4.9/5
Mitsubishi’s flagship cold-climate system: it makes more than its rated heat at 5 °F and keeps heating to −22 °F. For a home that relies on it as the main heat through a cold winter.
- 12,000 BTUSize
- 16,200 Btu/hHeat at 5 °F
- 123%Kept at 5 °F
- 12.4 / 29.9HSPF2 / SEER2
- Pro installInstall
See it at Mitsubishi
No store we check sells it online; the maker lists where to buy or who installs it.
Pros
- Makes 16,200 Btu/h at 5 °F, more than its rated 13,200 Btu/h
- Keeps heating down to −22 °F
- Among the most efficient here: HSPF2 12.4, SEER2 29.9
- 10-year parts and compressor warranty once registered
Cons
- Needs a licensed HVAC installer: a self-install voids the warranty
How it scores
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.
Specifications
| Capacity (certified) | |
|---|---|
| Size (nominal) | 12,000 BTU |
| Cooling at 95 °F | 12,000 Btu/h |
| Heating at 47 °F | 13,200 Btu/h |
| Heating at 17 °F (max) | 18,200 Btu/h |
| Heating at 5 °F (max) | 16,200 Btu/h |
| Heat kept at 5 °F | 123% |
| Efficiency (certified) | |
| HSPF2 (Region IV) | 12.4 |
| SEER2 | 29.9 |
| EER2 | 15.4 |
| COP at 5 °F | 2.20 |
| ENERGY STAR | ENERGY STAR Cold Climate |
| AHRI certificate | 215611126 |
| Operating range | |
| Heats down to | -22 °F |
| Cooling range | 14 to 115 °F |
| Installation | |
| Installed by | Professional (sold through installers) |
| Line set connection | Flare fittings (vacuum pump needed) |
| Line set | up to 65 ft |
| Voltage | 230 V |
| Refrigerant | R-454B |
| Indoor unit | MSZ-FX12NL |
| Outdoor unit | MUZ-FX12NLHZ |
| Build | |
| Indoor noise | 20–44 dB(A) |
| Outdoor noise | 49 dB(A) |
| Wi-Fi | Built in |
| Weight | indoor 31.4 lb / outdoor 89 lb |
| Warranty | 10 yr compressor, 10 yr parts |
| Warranty with DIY install | No, a licensed installer is required |
| Released | 2025-02 |
Alternatives in this size
LG Art Cool Deluxe 12,000 BTU
#3 in 12,000 BTUFull review
Heats down to −31 °F, the lowest limit here, and makes more than its rated heat at 5 °F. A strong pick for a very cold climate.
Senville Elite 12,000 BTU
#4 in 12,000 BTUFull review
Senville’s top line makes more than its rated heat at 5 °F, heats to −22 °F and carries a 10-year parts and compressor warranty. Sold online, but the warranty needs a licensed installer.
Amazon $1,599.99 Senville $1,599.99$1,599.99
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