Mitsubishi GX 36,000 BTU
#3 in 36,000 BTUFull review
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.
The Mitsubishi GX 36,000 BTU is the better mini-split overall, rated 2.9 to 2.7. The Mitsubishi GX 36,000 BTU leads on warranty and noise. The Klimaire DIY 5th Gen 36,000 BTU 230V wins on efficiency.
Klimaire DIY 5th Gen 36,000 BTU 230V
#4 in 36,000 BTUFull review
The best-value quick-connect line: the same certified system as Pioneer’s Quantum Ultra, close to Della’s Optima, without the vacuum pump, for the same price or a few hundred dollars more.
Amazon $2,619$2,619
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 Mitsubishi GX 36,000 BTU for warranty (10-year compressor, 10-year parts vs 7-year compressor, 5-year parts) and noise (indoor unit from 30 dB(A) vs indoor unit from 36 dB(A)).
- Choose the Klimaire DIY 5th Gen 36,000 BTU 230V for efficiency (9 HSPF2, 19 SEER2, COP 2.03 at 5 °F vs 8.5 HSPF2, 18.5 SEER2, COP 1.80 at 5 °F).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 36,000 BTU mini-split; a clear win is highlighted. How we rank explains each one.
| Factor weight | Mitsubishi GX 36,000 BTU | Klimaire DIY 5th Gen 36,000 BTU 230V |
|---|---|---|
| Overall rating | 2.9/5 | 2.7/5 |
| Cold weather 40% | 26 keeps 59% of its heat at 5 °F, heats down to -5 °F | 22 keeps 57% of its heat at 5 °F, heats down to -4 °F |
| Efficiency 30% | 17 8.5 HSPF2, 18.5 SEER2, COP 1.80 at 5 °F | 35 9 HSPF2, 19 SEER2, COP 2.03 at 5 °F |
| Warranty 20% | 100 10-year compressor, 10-year parts | 64 7-year compressor, 5-year parts |
| Noise 10% | 48 indoor unit from 30 dB(A) | 19 indoor unit from 36 dB(A) |
Specifications
| Mitsubishi GX 36,000 BTU | Klimaire DIY 5th Gen 36,000 BTU 230V | |
|---|---|---|
| Capacity (certified) | ||
| Size (nominal) | 36,000 BTU | 36,000 BTU |
| Cooling at 95 °F | 33,800 Btu/h | 36,000 Btu/h |
| Heating at 47 °F | 35,200 Btu/h | 36,000 Btu/h |
| Heating at 17 °F (max) | 26,400 Btu/h | 23,400 Btu/h |
| Heating at 5 °F (max) | 20,600 Btu/h | 20,400 Btu/h |
| Heat kept at 5 °F | 59% | 57% |
| Price per 1,000 Btu/h at 5 °F | - | $128 |
| Efficiency (certified) | ||
| HSPF2 (Region IV) | 8.5 | 9 |
| SEER2 | 18.5 | 19 |
| EER2 | 8.4 | 9 |
| COP at 5 °F | 1.80 | 2.03 |
| ENERGY STAR | Not ENERGY STAR | Not ENERGY STAR |
| AHRI certificate | 215862739 | 218067081 |
| Operating range | ||
| Heats down to | -5 °F | -4 °F |
| Cooling range | 14 to 115 °F | 5 to 122 °F |
| Installation | ||
| Installed by | Professional (sold through installers) | Sold for self-install (DIY) |
| Line set connection | Flare fittings (vacuum pump needed) | Quick-connect (no vacuum pump) |
| Line set | up to 100 ft | 25 ft included, up to 98 ft |
| Voltage | 230 V | 230 V |
| Refrigerant | R-454B | R-454B |
| Indoor unit | MSZ-GX36NL | KIWQ36H2-45T |
| Outdoor unit | MUZ-GX36NL | KOIQ36H2-45T |
| Build | ||
| Indoor noise | 30–53 dB(A) | 36–52 dB(A) |
| Outdoor noise | 57 dB(A) | 63 dB(A) |
| Wi-Fi | Built in | Built in |
| Weight | indoor 37 lb / outdoor 116 lb | indoor 39.7 lb / outdoor 105.8 lb |
| Warranty | 10 yr compressor, 10 yr parts | 7 yr compressor, 5 yr parts |
| Warranty with DIY install | No, a licensed installer is required | Yes |
| Released | 2025-02 | 2025-10 |