The cheapest way into a certified, cold-capable heat pump, for a self-installer with a vacuum pump. Pioneer’s Quantum Ultra and the quick-connect Klimaire DIY have near-identical certified ratings.
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) | 23,000 BTU |
| Cooling at 95 °F | 23,000 Btu/h |
| Heating at 47 °F | 25,000 Btu/h |
| Heating at 17 °F (max) | 21,000 Btu/h |
| Heating at 5 °F (max) | 18,600 Btu/h |
| Heat kept at 5 °F | 74% |
| Price per 1,000 Btu/h at 5 °F | $99 |
| Efficiency (certified) | |
| HSPF2 (Region IV) | 9.5 |
| SEER2 | 23 |
| EER2 | 11.7 |
| COP at 5 °F | 1.80 |
| ENERGY STAR | ENERGY STAR Cold Climate |
| AHRI certificate | 218471000 |
| Operating range | |
| Heats down to | -13 °F |
| Cooling range | 5 to 131 °F |
| Installation | |
| Line set connection | Flare fittings (vacuum pump needed) |
| Line set | 16.4 ft included, up to 65 ft |
| Voltage | 230 V |
| Refrigerant | R-454B |
| Indoor unit | 048-TP-23K2V-C-IN |
| Outdoor unit | 048-TP-23K2V-23S-OUT |
| Build | |
| Indoor noise | 34–50 dB(A) |
| Outdoor noise | 54 dB(A) |
| Wi-Fi | Built in |
| Room size (maker) | up to 1,500 sq ft |
| Weight | indoor 30.9 lb / outdoor 112.4 lb |
| Warranty | lifetime parts (registered) |
| Warranty with DIY install | Yes |
| Released | 2026-06 |
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 $2,323A quick-connect unit with one of the longest warranties for a self-install, priced below MrCool’s DIY 5th Gen. Its −4 °F heating limit rules it out as the only heat in a very cold climate.
Amazon $2,025.45The 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 $1,869Compare the Della Optima CloudAir 23,000 BTU 230V (24k class) with any other DIY mini-split →
More from Della: every Della product ranked.
