LG Art Cool Deluxe 9,000 BTU
#3 in 9,000 BTUFull review
Heats down to −31 °F, the lowest limit here, and makes more than its rated heat at 5 °F. A strong pick for a very cold climate.
The LG Art Cool Deluxe 9,000 BTU is the better mini-split overall, rated 4.8 to 4.4. The LG Art Cool Deluxe 9,000 BTU leads on efficiency and cold weather. The Mitsubishi Hyper-Heat GX 9,000 BTU wins on noise.
Mitsubishi Hyper-Heat GX 9,000 BTU
#9 in 9,000 BTUFull review
Mitsubishi’s mainstream Hyper-Heat line keeps its full rated heat at 5 °F and heats down to −13 °F. The FX goes further in deep cold and efficiency.
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 LG Art Cool Deluxe 9,000 BTU for efficiency (13.5 HSPF2, 27 SEER2, COP 2.04 at 5 °F vs 10.2 HSPF2, 28.4 SEER2, COP 1.80 at 5 °F) and cold weather (keeps 109% of its heat at 5 °F, heats down to -31 °F vs keeps 100% of its heat at 5 °F, heats down to -13 °F).
- Choose the Mitsubishi Hyper-Heat GX 9,000 BTU for noise (indoor unit from 19 dB(A) vs indoor unit from 21 dB(A)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 9,000 BTU mini-split; a clear win is highlighted. How we rank explains each one.
| Factor weight | LG Art Cool Deluxe 9,000 BTU | Mitsubishi Hyper-Heat GX 9,000 BTU |
|---|---|---|
| Overall rating | 4.8/5 | 4.4/5 |
| Cold weather 40% | 100 keeps 109% of its heat at 5 °F, heats down to -31 °F | 87 keeps 100% of its heat at 5 °F, heats down to -13 °F |
| Efficiency 30% | 87 13.5 HSPF2, 27 SEER2, COP 2.04 at 5 °F | 65 10.2 HSPF2, 28.4 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% | 90 indoor unit from 21 dB(A) | 100 indoor unit from 19 dB(A) |
Specifications
| LG Art Cool Deluxe 9,000 BTU | Mitsubishi Hyper-Heat GX 9,000 BTU | |
|---|---|---|
| Capacity (certified) | ||
| Size (nominal) | 9,000 BTU | 9,000 BTU |
| Cooling at 95 °F | 9,000 Btu/h | 9,000 Btu/h |
| Heating at 47 °F | 11,000 Btu/h | 9,600 Btu/h |
| Heating at 17 °F (max) | 13,730 Btu/h | 11,500 Btu/h |
| Heating at 5 °F (max) | 12,000 Btu/h | 9,600 Btu/h |
| Heat kept at 5 °F | 109% | 100% |
| Efficiency (certified) | ||
| HSPF2 (Region IV) | 13.5 | 10.2 |
| SEER2 | 27 | 28.4 |
| EER2 | 15.8 | 15.4 |
| COP at 5 °F | 2.04 | 1.80 |
| ENERGY STAR | ENERGY STAR Cold Climate | ENERGY STAR Cold Climate |
| AHRI certificate | 216368959 | 216626287 |
| Operating range | ||
| Heats down to | -31 °F | -13 °F |
| Cooling range | 14 to 118 °F | 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 65.6 ft | up to 65 ft |
| Voltage | 230 V | 230 V |
| Refrigerant | R-32 | R-454B |
| Indoor unit | KNSAL091A | MSZ-GX09NL |
| Outdoor unit | KUSAL091A | MUZ-GX09NLHZ |
| Build | ||
| Indoor noise | 21–42 dB(A) | 19–43 dB(A) |
| Outdoor noise | 48 dB(A) | 48 dB(A) |
| Wi-Fi | Built in | Built in |
| Weight | indoor 24.3 lb / outdoor 99.2 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 |