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.
Price checked October 21, 2026. As an Amazon Associate we earn from qualifying purchases.
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
| Capacity (certified) | |
|---|---|
| Size (nominal) | 36,000 BTU |
| Cooling at 95 °F | 36,000 Btu/h |
| Heating at 47 °F | 36,000 Btu/h |
| Heating at 17 °F (max) | 23,400 Btu/h |
| Heating at 5 °F (max) | 20,400 Btu/h |
| Heat kept at 5 °F | 57% |
| Price per 1,000 Btu/h at 5 °F | $128 |
| Efficiency (certified) | |
| HSPF2 (Region IV) | 9 |
| SEER2 | 19 |
| EER2 | 9 |
| COP at 5 °F | 2.03 |
| ENERGY STAR | Not ENERGY STAR |
| AHRI certificate | 218067081 |
| Operating range | |
| Heats down to | -4 °F |
| Cooling range | 5 to 122 °F |
| Installation | |
| Line set connection | Quick-connect (no vacuum pump) |
| Line set | 25 ft included, up to 98 ft |
| Voltage | 230 V |
| Refrigerant | R-454B |
| Indoor unit | KIWQ36H2-45T |
| Outdoor unit | KOIQ36H2-45T |
| Build | |
| Indoor noise | 36–52 dB(A) |
| Outdoor noise | 63 dB(A) |
| Wi-Fi | Built in |
| Weight | indoor 39.7 lb / outdoor 105.8 lb |
| Warranty | 7 yr compressor, 5 yr parts |
| Warranty with DIY install | Yes |
| Released | 2025-10 |
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 $3,790Compare the Klimaire KIWQ-KOIQ DIY 5th Gen 36,000 BTU 230V with any other DIY mini-split →
More from Klimaire: every Klimaire product ranked.
