The Senville Elite 12,000 BTU is the better mini-split overall, rated 4.8 to 3.9. The Senville Elite 12,000 BTU leads on cold weather and efficiency. The Mitsubishi GX 12,000 BTU wins on noise.
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 $1,599.99Mitsubishi’s standard line, quiet and efficient, for milder winters: it loses a good share of its heat in deep cold and stops heating at −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.
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 | Senville Elite 12,000 BTU | Mitsubishi GX 12,000 BTU |
|---|---|---|
| Overall rating | 4.8/5 | 3.9/5 |
| Cold weather 40% | 100 keeps 112% of its heat at 5 °F, heats down to -22 °F | 39 keeps 70% of its heat at 5 °F, heats down to -5 °F |
| Efficiency 30% | 86 12.7 HSPF2, 29.4 SEER2, COP 2.00 at 5 °F | 74 10.7 HSPF2, 25.6 SEER2, COP 1.80 at 5 °F |
| Warranty 20% | 100 10-year compressor, 10-year parts | 100 10-year compressor, 10-year parts |
| Noise 10% | 81 indoor unit from 23 dB(A) | 100 indoor unit from 19 dB(A) |
| Senville Elite 12,000 BTU | Mitsubishi GX 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 | 12,000 Btu/h | 14,400 Btu/h |
| Heating at 17 °F (max) | 14,600 Btu/h | 12,000 Btu/h |
| Heating at 5 °F (max) | 13,500 Btu/h | 10,100 Btu/h |
| Heat kept at 5 °F | 112% | 70% |
| Price per 1,000 Btu/h at 5 °F | $119 | - |
| Efficiency (certified) | ||
| HSPF2 (Region IV) | 12.7 | 10.7 |
| SEER2 | 29.4 | 25.6 |
| EER2 | 14.2 | 13.3 |
| COP at 5 °F | 2.00 | 1.80 |
| ENERGY STAR | ENERGY STAR Cold Climate | ENERGY STAR Cold Climate |
| AHRI certificate | 217607368 | 216626285 |
| Operating range | ||
| Heats down to | -22 °F | -5 °F |
| Cooling range | - | 14 to 115 °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 82 ft | up to 65 ft |
| Voltage | 230 V | 230 V |
| Refrigerant | R-454B | R-454B |
| Indoor unit | SENE-12EL-IHH | MSZ-GX12NL |
| Outdoor unit | SENE-12EL-OH | MUZ-GX12NL |
| Build | ||
| Indoor noise | 23–41.5 dB(A) | 19–45 dB(A) |
| Outdoor noise | 57 dB(A) | 49 dB(A) |
| Wi-Fi | Built in | Built in |
| Room size (maker) | up to 750 sq ft | - |
| Weight | indoor 28.2 lb / outdoor 99.7 lb | indoor 23 lb / outdoor 77 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 |
| Released | - | 2025-03 |
