The Pioneer Quantum Hyperformance 18,000 BTU 230V rates 4.2 among 18,000 BTU DIY mini-splits; the Pioneer Quantum Ultra 12,000 BTU 230V rates 3.9 among 12,000 BTU ones. The Pioneer Quantum Ultra 12,000 BTU 230V costs $730 less ($1,148 vs $1,878).
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 $1,878 Pioneer Mini Split store $1,878A low price for a self-installer who owns or will rent a vacuum pump. The Klimaire DIY is the same certified system with quick-connect lines, and Della’s Optima has near-identical ratings for less.
Amazon Pioneer Mini Split store $1,148Prices 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 (18,000 BTU and 12,000 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 18,000 BTU 230V | Pioneer Quantum Ultra 12,000 BTU 230V |
|---|---|---|
| Overall rating | 4.2/5 | 3.9/5 |
| Value 35% | 89 $106 per 1,000 Btu/h of heat at 5 °F | 90 $126 per 1,000 Btu/h of heat at 5 °F |
| Cold weather 25% | 99 keeps 99% of its heat at 5 °F, heats down to -22 °F | 53 keeps 72% of its heat at 5 °F, heats down to -13 °F |
| Efficiency 20% | 57 10 HSPF2, 23.5 SEER2, COP 1.80 at 5 °F | 69 10 HSPF2, 24 SEER2, COP 2.10 at 5 °F |
| Warranty 15% | 49 5-year compressor, 5-year parts, for a DIY install | 49 5-year compressor, 5-year parts, for a DIY install |
| Noise 5% | 29 indoor unit from 34 dB(A) | 48 indoor unit from 30 dB(A) |
| Pioneer Quantum Hyperformance 18,000 BTU 230V | Pioneer Quantum Ultra 12,000 BTU 230V | |
|---|---|---|
| Capacity (certified) | ||
| Size (nominal) | 18,000 BTU | 12,000 BTU |
| Cooling at 95 °F | 18,000 Btu/h | 12,000 Btu/h |
| Heating at 47 °F | 18,000 Btu/h | 12,600 Btu/h |
| Heating at 17 °F (max) | 20,000 Btu/h | 10,000 Btu/h |
| Heating at 5 °F (max) | 17,800 Btu/h | 9,100 Btu/h |
| Heat kept at 5 °F | 99% | 72% |
| Price per 1,000 Btu/h at 5 °F | $106 | $126 |
| Efficiency (certified) | ||
| HSPF2 (Region IV) | 10 | 10 |
| SEER2 | 23.5 | 24 |
| EER2 | 12.5 | 13 |
| COP at 5 °F | 1.80 | 2.10 |
| ENERGY STAR | ENERGY STAR Cold Climate | ENERGY STAR Cold Climate |
| AHRI certificate | 217048756 | 217048751 |
| Operating range | ||
| Heats down to | -22 °F | -13 °F |
| Cooling range | 5 to 131 °F | 5 to 131 °F |
| Installation | ||
| Line set connection | Flare fittings (vacuum pump needed) | Flare fittings (vacuum pump needed) |
| Line set | 16 ft included, up to 65 ft | 16 ft included, up to 50 ft |
| Voltage | 230 V | 230 V |
| Refrigerant | R-454B | R-454B |
| Indoor unit | WT018GLSI25HLH | WT012GLSI24HLG |
| Outdoor unit | YN018GLSI25RPH | YN012GLSI24RPG |
| Build | ||
| Indoor noise | 34–48 dB(A) | 30–46 dB(A) |
| Outdoor noise | 58 dB(A) | 52 dB(A) |
| Wi-Fi | Built in | Built in |
| Room size (maker) | up to 750 sq ft | up to 500 sq ft |
| Weight | indoor 30.9 lb / outdoor 93.7 lb | indoor 23.1 lb / outdoor 58.4 lb |
| Warranty | 10 yr compressor, 7 yr parts | 10 yr compressor, 7 yr parts |
| Warranty with DIY install | Yes | Yes |
| DIY install warranty | 5 yr compressor, 5 yr parts | 5 yr compressor, 5 yr parts |
| Released | 2025-06 | 2025-06 |
