The Klimaire KIWQ-KOIQ DIY 5th Gen 24,000 BTU 230V rates 3.8 among 24,000 BTU DIY mini-splits; the Klimaire KIWQ-KOIQ DIY 5th Gen 18,000 BTU 230V rates 3.7 among 18,000 BTU ones. The Klimaire KIWQ-KOIQ DIY 5th Gen 18,000 BTU 230V costs $190 less ($1,679 vs $1,869).
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 $1,869The 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 $1,679Prices 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 18,000 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 | Klimaire KIWQ-KOIQ DIY 5th Gen 24,000 BTU 230V | Klimaire KIWQ-KOIQ DIY 5th Gen 18,000 BTU 230V |
|---|---|---|
| Overall rating | 3.8/5 | 3.7/5 |
| Value 35% | 84 $99 per 1,000 Btu/h of heat at 5 °F | 80 $123 per 1,000 Btu/h of heat at 5 °F |
| Cold weather 25% | 58 keeps 76% of its heat at 5 °F, heats down to -13 °F | 53 keeps 72% of its heat at 5 °F, heats down to -13 °F |
| Efficiency 20% | 47 9.5 HSPF2, 23 SEER2, COP 1.80 at 5 °F | 56 10 HSPF2, 23 SEER2, COP 1.80 at 5 °F |
| Warranty 15% | 64 7-year compressor, 5-year parts | 64 7-year compressor, 5-year parts |
| Noise 5% | 29 indoor unit from 34 dB(A) | 29 indoor unit from 34 dB(A) |
| Klimaire KIWQ-KOIQ DIY 5th Gen 24,000 BTU 230V | Klimaire KIWQ-KOIQ DIY 5th Gen 18,000 BTU 230V | |
|---|---|---|
| Capacity (certified) | ||
| Size (nominal) | 24,000 BTU | 18,000 BTU |
| Cooling at 95 °F | 23,000 Btu/h | 18,000 Btu/h |
| Heating at 47 °F | 25,000 Btu/h | 19,000 Btu/h |
| Heating at 17 °F (max) | 22,000 Btu/h | 17,500 Btu/h |
| Heating at 5 °F (max) | 18,900 Btu/h | 13,600 Btu/h |
| Heat kept at 5 °F | 76% | 72% |
| Price per 1,000 Btu/h at 5 °F | $99 | $123 |
| Efficiency (certified) | ||
| HSPF2 (Region IV) | 9.5 | 10 |
| SEER2 | 23 | 23 |
| EER2 | 11.7 | 12.5 |
| COP at 5 °F | 1.80 | 1.80 |
| ENERGY STAR | ENERGY STAR Cold Climate | ENERGY STAR Cold Climate |
| AHRI certificate | 218067071 | 218067070 |
| Operating range | ||
| Heats down to | -13 °F | -13 °F |
| Cooling range | 5 to 131 °F | 5 to 131 °F |
| Installation | ||
| Line set connection | Quick-connect (no vacuum pump) | Quick-connect (no vacuum pump) |
| Line set | 25 ft included, up to 65 ft | 25 ft included, up to 65 ft |
| Voltage | 230 V | 230 V |
| Refrigerant | R-454B | R-454B |
| Indoor unit | KIWQ24H2-45T | KIWQ18H2-45T |
| Outdoor unit | KOIQ24H2-45T | KOIQ18H2-45T |
| Build | ||
| Indoor noise | 34–50 dB(A) | 34–50 dB(A) |
| Outdoor noise | 54 dB(A) | 53 dB(A) |
| Wi-Fi | Built in | Built in |
| Weight | indoor 30.9 lb / outdoor 104.7 lb | indoor 30.9 lb / outdoor 90.4 lb |
| Warranty | 7 yr compressor, 5 yr parts | 7 yr compressor, 5 yr parts |
| Warranty with DIY install | Yes | Yes |
| Released | 2025-10 | 2025-10 |
