Mitsubishi MSZ-GX12NL 12,000 BTU vs Mitsubishi MSZ-WX12NL 12,000 BTU
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Quick take: The Mitsubishi MSZ-WX12NL 12,000 BTU costs $878 less; the Mitsubishi MSZ-GX12NL 12,000 BTU is the more efficient unit (25.6 SEER2).
| Spec | Mitsubishi MSZ-GX12NL 12,000 BTU | Mitsubishi MSZ-WX12NL 12,000 BTU |
|---|---|---|
| Price | ~$2,511 | ~$1,633 |
| Type | Single-Zone | Single-Zone |
| Capacity | 12k BTU | 12k BTU |
| Coverage | ~500 sq ft | ~500 sq ft |
| SEER2 (cooling) | 25.6 | 18 |
| HSPF2 (heating) | 10.7 | 8.5 |
| Low-Ambient Heating | to -5°F | to -13°F |
| Max heat at 5°F (NEEP) | 10,100 BTU | not listed |
| Heat kept at 5°F | 70% of rated | — |
| Refrigerant | R-454B | R-454B |
| Zones | Single zone | Single zone |
| Voltage | 230V | 208/230V |
| WiFi Control | Built-in | Built-in |
| Install | Licensed-contractor install, like the GL before it: registration plus a licensed install is what turns the 5/7-year warranty into 10 years. The system allows up to 65 ft of line set and 40 ft of vertical rise, so most single-room layouts fit. | Licensed-contractor install. Mitsubishi's 10-year parts and compressor term applies only when a licensed contractor installs the system and it is registered online; otherwise it is 5 years parts and 7 years compressor. Lineset is 1/4" x 3/8" (65 ft max run, 40 ft max rise) flare. R-454B is a mildly flammable (A2L) refrigerant, so hire someone trained and equipped for it. The system draws 8A (MCA) on a 15A circuit. |
| Warranty | 5-year parts / 7-year compressor standard; 10 years parts and compressor when installed by a licensed contractor and registered; 12 years via a Mitsubishi Diamond Contractor installation and registration. | 5-year parts / 7-year compressor standard; 10 years parts and compressor when installed by a licensed contractor and registered online. |
Pros & cons
Mitsubishi MSZ-GX12NL 12,000 BTU
- ✓25.6 SEER2 beats the GL12's 23.1 with the same 10.7 HSPF2
- ✓Wi-Fi built into the head; the GL needed a Kumo Cloud adapter or a third-party controller
- ✓Quiet indoor unit, rated as low as 19 dB(A) on its lowest fan speed
- ✓Same head pairs with the MUZ-GX12NLHZ hyper-heat outdoor unit if you need winter capacity
- ✓Up to 65 ft of line set and 40 ft of rise for awkward head placements
- ✓10-year parts and compressor coverage with a licensed install and registration
- ✗Only 10,100 BTU at 5°F per NEEP, about 70% of its 47°F rating; not primary heat in a cold climate
- ✗About $2,500 for the system, close to $1,000 above the GL12's closeout price
- ✗Easy to mix up with the hyper-heat MUZ-GX12NLHZ; check the outdoor model number on any quote
- ✗R-454B (A2L) installs need an installer trained and equipped for it
Mitsubishi MSZ-WX12NL 12,000 BTU
- ✓Lowest-priced Mitsubishi wall system, about $1,630
- ✓Same 10-year registered warranty as the premium lines
- ✓8A MCA on a 15A breaker
- ✗18 SEER2 / 8.5 HSPF2 are low for the price
- ✗Only 7,500 BTU of heat at 17°F; not a hyper-heat unit
- ✗Needs 208/230V, no 115V option in this model