LG Art Cool Mirror 9,000 BTU
#13 in 9,000 BTUFull review
For mild to moderate winters: it heats only down to −4 °F and loses some of its heat in deep cold.
4.0/5
Mitsubishi’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.
- 9,000 BTUSize
- 8,100 Btu/hHeat at 5 °F
- 74%Kept at 5 °F
- 10.9 / 28.4HSPF2 / 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
- 10-year parts and compressor warranty once registered
- Very quiet indoor unit, rated from 19 dB(A)
Cons
- Keeps heating only down to −5 °F
- 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) | 9,000 BTU |
| Cooling at 95 °F | 9,000 Btu/h |
| Heating at 47 °F | 10,900 Btu/h |
| Heating at 17 °F (max) | 10,200 Btu/h |
| Heating at 5 °F (max) | 8,100 Btu/h |
| Heat kept at 5 °F | 74% |
| Efficiency (certified) | |
| HSPF2 (Region IV) | 10.9 |
| SEER2 | 28.4 |
| EER2 | 15.4 |
| COP at 5 °F | 1.80 |
| ENERGY STAR | ENERGY STAR Cold Climate |
| AHRI certificate | 216626284 |
| Operating range | |
| Heats down to | -5 °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-GX09NL |
| Outdoor unit | MUZ-GX09NL |
| Build | |
| Indoor noise | 19–43 dB(A) |
| Outdoor noise | 48 dB(A) |
| Wi-Fi | Built in |
| Weight | indoor 23 lb / outdoor 77 lb |
| Warranty | 10 yr compressor, 10 yr parts |
| Warranty with DIY install | No, a licensed installer is required |
| Released | 2025-03 |
Alternatives in this size
MrCool DIY 5th Gen 9,000 BTU 115V
#14 in 9,000 BTUFull review
For someone who wants a true plug-together install with no tools beyond a drill, and a warranty that survives it. Expect to pay well over the price of a flare unit with the same cold-weather output.
Amazon MRCOOL DIY Direct $2,330$2,330
Fujitsu Altair 500 9,000 BTU
#16 in 9,000 BTUFull review
Fujitsu’s mainstream line for cooling and mild-winter heating, with a 10-year registered warranty. It stops heating below 5 °F.
Compare
Compare the Mitsubishi GX 9,000 BTU with any other mini-split →
More from Mitsubishi: every Mitsubishi product ranked.