The Pioneer Quantum Hyperformance 9,000 BTU 230V is the better DIY mini-split overall, rated 4.3 to 2.8. The Pioneer Quantum Hyperformance 9,000 BTU 230V leads on efficiency, value and warranty. The MrCool DIY Select 9,000 BTU 115V wins on noise. The MrCool DIY Select 9,000 BTU 115V costs $62 less ($1,249 vs $1,311).
Full rated heat in deep cold at a fair price, for a self-installer comfortable with a vacuum pump. Della’s Optima Pro has near-identical certified ratings for a little less.
Amazon $1,311 Pioneer Mini Split store $1,318For mild climates and occasional use, where a low price for a quick-connect unit matters most. The short warranty and weak cold-weather output make it a poor main heat source.
Amazon $1,249 MRCOOL DIY Direct $1,249Prices 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 9,000 BTU DIY mini-split; a clear win is highlighted. How we rank explains each one.
| Factor weight | Pioneer Quantum Hyperformance 9,000 BTU 230V | MrCool DIY Select 9,000 BTU 115V |
|---|---|---|
| Overall rating | 4.3/5 | 2.8/5 |
| Value 35% | 85 $138 per 1,000 Btu/h of heat at 5 °F | 57 $208 per 1,000 Btu/h of heat at 5 °F |
| Cold weather 25% | 100 keeps 106% of its heat at 5 °F, heats down to -22 °F | 34 keeps 67% of its heat at 5 °F |
| Efficiency 20% | 70 10.5 HSPF2, 25 SEER2, COP 1.80 at 5 °F | 17 8.8 HSPF2, 17.5 SEER2, COP 1.76 at 5 °F |
| Warranty 15% | 49 5-year compressor, 5-year parts, for a DIY install | 0 2-year compressor, 1-year parts |
| Noise 5% | 67 indoor unit from 26 dB(A) | 100 indoor unit from 18 dB(A) |
| Pioneer Quantum Hyperformance 9,000 BTU 230V | MrCool DIY Select 9,000 BTU 115V | |
|---|---|---|
| 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 | 9,000 Btu/h | 9,000 Btu/h |
| Heating at 17 °F (max) | 10,600 Btu/h | 7,200 Btu/h |
| Heating at 5 °F (max) | 9,500 Btu/h | 6,000 Btu/h |
| Heat kept at 5 °F | 106% | 67% |
| Price per 1,000 Btu/h at 5 °F | $138 | $208 |
| Efficiency (certified) | ||
| HSPF2 (Region IV) | 10.5 | 8.8 |
| SEER2 | 25 | 17.5 |
| EER2 | 14.5 | 9.8 |
| COP at 5 °F | 1.80 | 1.76 |
| ENERGY STAR | ENERGY STAR Cold Climate | Not ENERGY STAR |
| AHRI certificate | 217048754 | 218004484 |
| Operating range | ||
| Heats down to | -22 °F | - |
| Cooling range | 5 to 131 °F | - |
| Installation | ||
| Line set connection | Flare fittings (vacuum pump needed) | Quick-connect (no vacuum pump) |
| Line set | 16 ft included, up to 50 ft | 11.5 ft included, up to 75 ft |
| Voltage | 230 V | 115 V |
| Refrigerant | R-454B | R-454B |
| Indoor unit | WT009GLSI25HLH | DIYS-09-HP-WMAH-115A13-O |
| Outdoor unit | YN009GLSI25RPH | DIYS-09-HP-C-115A11-O |
| Build | ||
| Indoor noise | 26–42 dB(A) | 18–43 dB(A) |
| Outdoor noise | 55 dB(A) | 54 dB(A) |
| Wi-Fi | Built in | Built in |
| Room size (maker) | up to 350 sq ft | up to 400 sq ft |
| Weight | indoor 20.7 lb / outdoor 54 lb | indoor 23.8 lb / outdoor 54.7 lb |
| Warranty | 10 yr compressor, 7 yr parts | 2 yr compressor, 1 yr parts |
| Warranty with DIY install | Yes | Yes |
| DIY install warranty | 5 yr compressor, 5 yr parts | - |
| Released | 2025-06 | - |
