The MrCool DIY 5th Gen 36,000 BTU 230V and the Mitsubishi GX 36,000 BTU are evenly matched, rated 2.9 and 2.9. The MrCool DIY 5th Gen 36,000 BTU 230V leads on cold weather and noise. The Mitsubishi GX 36,000 BTU wins on warranty.
The pricier of the two 36,000 BTU quick-connect units, with a better heating limit and quieter indoor unit than the Klimaire. Neither keeps much of its heat in deep cold.
Amazon $3,569.99 MRCOOL DIY Direct $3,790Mitsubishi’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 36,000 BTU mini-split; a clear win is highlighted. How we rank explains each one.
| Factor weight | MrCool DIY 5th Gen 36,000 BTU 230V | Mitsubishi GX 36,000 BTU |
|---|---|---|
| Overall rating | 2.9/5 | 2.9/5 |
| Cold weather 40% | 40 keeps 61% of its heat at 5 °F, heats down to -13 °F | 26 keeps 59% of its heat at 5 °F, heats down to -5 °F |
| Efficiency 30% | 21 8.5 HSPF2, 18 SEER2, COP 1.97 at 5 °F | 17 8.5 HSPF2, 18.5 SEER2, COP 1.80 at 5 °F |
| Warranty 20% | 64 7-year compressor, 5-year parts | 100 10-year compressor, 10-year parts |
| Noise 10% | 60 indoor unit from 27.5 dB(A) | 48 indoor unit from 30 dB(A) |
| MrCool DIY 5th Gen 36,000 BTU 230V | Mitsubishi GX 36,000 BTU | |
|---|---|---|
| Capacity (certified) | ||
| Size (nominal) | 36,000 BTU | 36,000 BTU |
| Cooling at 95 °F | 36,000 Btu/h | 33,800 Btu/h |
| Heating at 47 °F | 36,000 Btu/h | 35,200 Btu/h |
| Heating at 17 °F (max) | 26,300 Btu/h | 26,400 Btu/h |
| Heating at 5 °F (max) | 22,000 Btu/h | 20,600 Btu/h |
| Heat kept at 5 °F | 61% | 59% |
| Price per 1,000 Btu/h at 5 °F | $162 | - |
| Efficiency (certified) | ||
| HSPF2 (Region IV) | 8.5 | 8.5 |
| SEER2 | 18 | 18.5 |
| EER2 | 8.5 | 8.4 |
| COP at 5 °F | 1.97 | 1.80 |
| ENERGY STAR | Not ENERGY STAR | Not ENERGY STAR |
| AHRI certificate | 216032548 | 215862739 |
| Operating range | ||
| Heats down to | -13 °F | -5 °F |
| Cooling range | -13 to 122 °F | 14 to 115 °F |
| Installation | ||
| Installed by | Sold for self-install (DIY) | Professional (sold through installers) |
| Line set connection | Quick-connect (no vacuum pump) | Flare fittings (vacuum pump needed) |
| Line set | 25 ft included, up to 75 ft | up to 100 ft |
| Voltage | 230 V | 230 V |
| Refrigerant | R-454B | R-454B |
| Indoor unit | DIY-36-HP-WMAH-230D25-O | MSZ-GX36NL |
| Outdoor unit | DIY-36-HP-C-230D25-O | MUZ-GX36NL |
| Build | ||
| Indoor noise | 27.5–55.5 dB(A) | 30–53 dB(A) |
| Outdoor noise | 60.5 dB(A) | 57 dB(A) |
| Wi-Fi | Built in | Built in |
| Room size (maker) | up to 1,550 sq ft | - |
| Weight | indoor 48.7 lb / outdoor 152.1 lb | indoor 37 lb / outdoor 116 lb |
| Warranty | 7 yr compressor, 5 yr parts | 10 yr compressor, 10 yr parts |
| Warranty with DIY install | Yes | No, a licensed installer is required |
| Released | - | 2025-02 |
