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.
The Fujitsu Orion XLTH+ 12,000 BTU is the better mini-split overall, rated 4.9 to 4.2. The Fujitsu Orion XLTH+ 12,000 BTU leads on efficiency, warranty and cold weather. The MrCool DIY Hyper Heat 5th Gen 12,000 BTU 230V wins on noise.
MrCool DIY Hyper Heat 5th Gen 12,000 BTU 230V
#11 in 12,000 BTUFull review
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 $2,557$2,532
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 Orion XLTH+ 12,000 BTU for efficiency (13.7 HSPF2, 31.5 SEER2, COP 2.18 at 5 °F vs 10 HSPF2, 23.5 SEER2, COP 1.80 at 5 °F), warranty (10-year compressor, 10-year parts vs 7-year compressor, 5-year parts) and cold weather (keeps 134% of its heat at 5 °F, heats down to -22 °F vs keeps 92% of its heat at 5 °F, heats down to -22 °F).
- Choose the MrCool DIY Hyper Heat 5th Gen 12,000 BTU 230V for noise (indoor unit from 18 dB(A) vs indoor unit from 23 dB(A)).
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 Orion XLTH+ 12,000 BTU | MrCool DIY Hyper Heat 5th Gen 12,000 BTU 230V |
|---|---|---|
| Overall rating | 4.9/5 | 4.2/5 |
| Cold weather 40% | 100 keeps 134% of its heat at 5 °F, heats down to -22 °F | 90 keeps 92% of its heat at 5 °F, heats down to -22 °F |
| Efficiency 30% | 92 13.7 HSPF2, 31.5 SEER2, COP 2.18 at 5 °F | 57 10 HSPF2, 23.5 SEER2, COP 1.80 at 5 °F |
| Warranty 20% | 100 10-year compressor, 10-year parts | 64 7-year compressor, 5-year parts |
| Noise 10% | 81 indoor unit from 23 dB(A) | 100 indoor unit from 18 dB(A) |
Specifications
| Fujitsu Orion XLTH+ 12,000 BTU | MrCool DIY Hyper Heat 5th Gen 12,000 BTU 230V | |
|---|---|---|
| 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 | 15,300 Btu/h | 12,000 Btu/h |
| Heating at 17 °F (max) | 22,800 Btu/h | 12,500 Btu/h |
| Heating at 5 °F (max) | 20,500 Btu/h | 11,000 Btu/h |
| Heat kept at 5 °F | 134% | 92% |
| Price per 1,000 Btu/h at 5 °F | - | $230 |
| Efficiency (certified) | ||
| HSPF2 (Region IV) | 13.7 | 10 |
| SEER2 | 31.5 | 23.5 |
| EER2 | 16.7 | 12.8 |
| COP at 5 °F | 2.18 | 1.80 |
| ENERGY STAR | ENERGY STAR Cold Climate | ENERGY STAR Cold Climate |
| AHRI certificate | 216018256 | 216032549 |
| Operating range | ||
| Heats down to | -22 °F | -22 °F |
| Cooling range | 14 to 122 °F | -22 to 122 °F |
| Installation | ||
| Installed by | Professional (sold through installers) | Sold for self-install (DIY) |
| Line set connection | Flare fittings (vacuum pump needed) | Quick-connect (no vacuum pump) |
| Line set | up to 66 ft | 25 ft included, up to 75 ft |
| Voltage | 230 V | 230 V |
| Refrigerant | R-32 | R-454B |
| Indoor unit | ASUH12KTAS | DIY-12-HP-WMAH-230D25-O |
| Outdoor unit | AOUH12KTAP1 | DIYHH-12-HP-C-230D25-O |
| Build | ||
| Indoor noise | 23–45 dB(A) | 18–45.5 dB(A) |
| Outdoor noise | 48 dB(A) | 56.5 dB(A) |
| Wi-Fi | Built in | Built in |
| Room size (maker) | - | up to 550 sq ft |
| Weight | indoor 31 lb / outdoor 93 lb | indoor 24.5 lb / outdoor 72.3 lb |
| Warranty | 10 yr compressor, 10 yr parts | 7 yr compressor, 5 yr parts |
| Warranty with DIY install | No, a licensed installer is required | Yes |