The Pioneer Quantum Hyperformance 24,000 BTU 230V rates 4.0 among 24,000 BTU DIY mini-splits; the Klimaire KIWQ-KOIQ DIY 5th Gen 36,000 BTU 230V rates 3.1 among 36,000 BTU ones. The Pioneer Quantum Hyperformance 24,000 BTU 230V costs $321 less ($2,298 vs $2,619).
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 $2,298 Pioneer Mini Split store $2,323The 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 $2,619Prices 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.
These two sit in different size classes (24,000 BTU and 36,000 BTU), and each is scored against the reference points for its own class, so a rating says how well each does among its own size peers. How we rank explains each factor.
| Factor weight | Pioneer Quantum Hyperformance 24,000 BTU 230V | Klimaire KIWQ-KOIQ DIY 5th Gen 36,000 BTU 230V |
|---|---|---|
| Overall rating | 4.0/5 | 3.1/5 |
| Value 35% | 82 $103 per 1,000 Btu/h of heat at 5 °F | 64 $128 per 1,000 Btu/h of heat at 5 °F |
| Cold weather 25% | 92 keeps 93% of its heat at 5 °F, heats down to -22 °F | 22 keeps 57% of its heat at 5 °F, heats down to -4 °F |
| Efficiency 20% | 54 10 HSPF2, 22.5 SEER2, COP 1.80 at 5 °F | 35 9 HSPF2, 19 SEER2, COP 2.03 at 5 °F |
| Warranty 15% | 49 5-year compressor, 5-year parts, for a DIY install | 64 7-year compressor, 5-year parts |
| Noise 5% | 38 indoor unit from 32 dB(A) | 19 indoor unit from 36 dB(A) |
| Pioneer Quantum Hyperformance 24,000 BTU 230V | Klimaire KIWQ-KOIQ DIY 5th Gen 36,000 BTU 230V | |
|---|---|---|
| Capacity (certified) | ||
| Size (nominal) | 24,000 BTU | 36,000 BTU |
| Cooling at 95 °F | 24,000 Btu/h | 36,000 Btu/h |
| Heating at 47 °F | 24,000 Btu/h | 36,000 Btu/h |
| Heating at 17 °F (max) | 24,000 Btu/h | 23,400 Btu/h |
| Heating at 5 °F (max) | 22,400 Btu/h | 20,400 Btu/h |
| Heat kept at 5 °F | 93% | 57% |
| Price per 1,000 Btu/h at 5 °F | $103 | $128 |
| Efficiency (certified) | ||
| HSPF2 (Region IV) | 10 | 9 |
| SEER2 | 22.5 | 19 |
| EER2 | 11.7 | 9 |
| COP at 5 °F | 1.80 | 2.03 |
| ENERGY STAR | ENERGY STAR Cold Climate | Not ENERGY STAR |
| AHRI certificate | 217048757 | 218067081 |
| Operating range | ||
| Heats down to | -22 °F | -4 °F |
| Cooling range | 5 to 131 °F | 5 to 122 °F |
| Installation | ||
| Line set connection | Flare fittings (vacuum pump needed) | Quick-connect (no vacuum pump) |
| Line set | 16 ft included, up to 65 ft | 25 ft included, up to 98 ft |
| Voltage | 230 V | 230 V |
| Refrigerant | R-454B | R-454B |
| Indoor unit | WT024GLSI25HLH | KIWQ36H2-45T |
| Outdoor unit | YN024GLSI25RPH | KOIQ36H2-45T |
| Build | ||
| Indoor noise | 32–49 dB(A) | 36–52 dB(A) |
| Outdoor noise | 61 dB(A) | 63 dB(A) |
| Wi-Fi | Built in | Built in |
| Room size (maker) | up to 1,000 sq ft | - |
| Weight | indoor 30.9 lb / outdoor 108 lb | indoor 39.7 lb / outdoor 105.8 lb |
| Warranty | 10 yr compressor, 7 yr parts | 7 yr compressor, 5 yr parts |
| Warranty with DIY install | Yes | Yes |
| DIY install warranty | 5 yr compressor, 5 yr parts | - |
| Released | 2025-06 | 2025-10 |
