ACiQ Extreme Heat 24,000 BTU
#2 in 24,000 BTUFull review
ACiQ’s cold-climate line, sold online, keeps most of its rated heat at 5 °F, heats to −22 °F and gets a 12-year compressor warranty once registered. A certified technician has to install it.
4.3/5
A cold-climate unit sold online by Senville that keeps most of its rated heat at 5 °F and heats to −22 °F. Parts cover is 5 years, half the compressor’s 10.
- 24,000 BTUSize
- 24,200 Btu/hHeat at 5 °F
- 83%Kept at 5 °F
- 13.5 / 21HSPF2 / SEER2
- Pro installInstall
- $74Price / kBtu
Check price at Senville$1,799.99
Price checked October 21, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Keeps heating down to −22 °F
- Among the most efficient here: HSPF2 13.5, SEER2 21
- 10-year compressor warranty once registered (5 years on parts)
Cons
- Indoor noise isn’t published
- Needs a licensed HVAC installer: a self-install voids the warranty
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Capacity (certified) | |
|---|---|
| Size (nominal) | 24,000 BTU |
| Cooling at 95 °F | 24,000 Btu/h |
| Heating at 47 °F | 29,000 Btu/h |
| Heating at 17 °F (max) | 23,200 Btu/h |
| Heating at 5 °F (max) | 24,200 Btu/h |
| Heat kept at 5 °F | 83% |
| Price per 1,000 Btu/h at 5 °F | $74 |
| Efficiency (certified) | |
| HSPF2 (Region IV) | 13.5 |
| SEER2 | 21 |
| EER2 | 13 |
| COP at 5 °F | 2.34 |
| ENERGY STAR | ENERGY STAR Cold Climate |
| AHRI certificate | 215735298 |
| Operating range | |
| Heats down to | -22 °F |
| Installation | |
| Installed by | Professional (sold through installers) |
| Line set connection | Flare fittings (vacuum pump needed) |
| Line set | up to 164 ft |
| Voltage | 230 V |
| Refrigerant | R-454B |
| Indoor unit | SENA-24HF-IGG |
| Outdoor unit | SENA-24HF-OG |
| Build | |
| Wi-Fi | Built in |
| Warranty | 10 yr compressor, 5 yr parts |
| Warranty with DIY install | No, a licensed installer is required |
Alternatives in this size
Fujitsu Orion XLTH 24,000 BTU
#3 in 24,000 BTUFull review
Fujitsu’s cold-climate line, with more than its rated heat at 5 °F and very high certified efficiency, for homes heating through a cold winter.
Mitsubishi Hyper-Heat GX 24,000 BTU
#5 in 24,000 BTUFull review
Mitsubishi’s mainstream Hyper-Heat line keeps its full rated heat at 5 °F and heats down to −13 °F. The FX goes further in deep cold and efficiency.
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