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 2.6. The Fujitsu Orion XLTH+ 12,000 BTU leads on cold weather, efficiency and warranty. The Senville Leto 12,000 BTU 115V wins on noise.
Senville Leto 12,000 BTU 115V
#28 in 12,000 BTUFull review
Senville’s budget line, for cooling and mild winters: it stops heating below 5 °F, and the 5-year warranty needs a licensed installer.
Senville $799.99$799.99
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 cold weather (keeps 134% of its heat at 5 °F, heats down to -22 °F vs keeps 55% of its heat at 5 °F, heats down to 5 °F), efficiency (13.7 HSPF2, 31.5 SEER2, COP 2.18 at 5 °F vs 8.7 HSPF2, 21.2 SEER2, COP 1.84 at 5 °F) and warranty (10-year compressor, 10-year parts vs 5-year compressor, 5-year parts).
- Choose the Senville Leto 12,000 BTU 115V for noise (indoor unit from 17.5 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 | Senville Leto 12,000 BTU 115V |
|---|---|---|
| Overall rating | 4.9/5 | 2.6/5 |
| Cold weather 40% | 100 keeps 134% of its heat at 5 °F, heats down to -22 °F | 6 keeps 55% of its heat at 5 °F, heats down to 5 °F |
| Efficiency 30% | 92 13.7 HSPF2, 31.5 SEER2, COP 2.18 at 5 °F | 30 8.7 HSPF2, 21.2 SEER2, COP 1.84 at 5 °F |
| Warranty 20% | 100 10-year compressor, 10-year parts | 49 5-year compressor, 5-year parts |
| Noise 10% | 81 indoor unit from 23 dB(A) | 100 indoor unit from 17.5 dB(A) |
Specifications
| Fujitsu Orion XLTH+ 12,000 BTU | Senville Leto 12,000 BTU 115V | |
|---|---|---|
| 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 | 9,000 Btu/h |
| Heating at 5 °F (max) | 20,500 Btu/h | 6,600 Btu/h |
| Heat kept at 5 °F | 134% | 55% |
| Price per 1,000 Btu/h at 5 °F | - | $121 |
| Efficiency (certified) | ||
| HSPF2 (Region IV) | 13.7 | 8.7 |
| SEER2 | 31.5 | 21.2 |
| EER2 | 16.7 | 10.1 |
| COP at 5 °F | 2.18 | 1.84 |
| ENERGY STAR | ENERGY STAR Cold Climate | Not ENERGY STAR |
| AHRI certificate | 216018256 | 215735287 |
| Operating range | ||
| Heats down to | -22 °F | 5 °F |
| Cooling range | 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 82 ft |
| Voltage | 230 V | 115 V |
| Refrigerant | R-32 | R-454B |
| Indoor unit | ASUH12KTAS | SENL-12CD-ILL |
| Outdoor unit | AOUH12KTAP1 | SENL-12CD-OL |
| Build | ||
| Indoor noise | 23–45 dB(A) | 17.5–45 dB(A) |
| Outdoor noise | 48 dB(A) | 54 dB(A) |
| Wi-Fi | Built in | Built in |
| Room size (maker) | - | up to 750 sq ft |
| Weight | indoor 31 lb / outdoor 93 lb | indoor 19.4 lb / outdoor 61.3 lb |
| Warranty | 10 yr compressor, 10 yr parts | 5 yr compressor, 5 yr parts |
| Warranty with DIY install | No, a licensed installer is required | No, a licensed installer is required |