ACiQ 5 Ton Split Heat Pump AC System | 17.5 SEER2 High Efficiency Inverter Heats Down To -22° F and Beyond| Extreme+ Series R454B
Check current price on AC Direct →
Key features
- 17.5 SEER2 variable-speed inverter compressor for part-load efficiency and humidity control
- Rated heating operation to -22 degrees F, qualifying it as a cold-climate heat pump
- R-454B refrigerant with lower global warming potential than R-410A, future-proofed for refrigerant regulations
- 12-year parts and compressor warranty included at purchase, no dealer markup required
- 5-ton capacity suited to homes roughly 2,400 to 3,000 square feet depending on load calculation
- Sold factory-direct, bypassing dealer markup on both equipment and warranty registration
About this system
The ACiQ Extreme+ 5-ton split heat pump is built around a variable-speed inverter compressor and the newer R-454B refrigerant, landing at a 17.5 SEER2 efficiency rating. For a house in the 2,400 to 3,000 square foot range with a reasonably well-sealed duct system, that efficiency tier means noticeably lower operating costs compared to a standard single-stage unit, and the inverter drive lets the system modulate capacity rather than cycle on and off, which helps with humidity control and comfort consistency.
The headline spec for cold climates is heating operation rated down to -22 degrees F. That puts it in the same category as the dedicated cold-climate heat pumps that major brands charge a significant premium for, though buyers in regions that regularly see sustained temperatures below zero should verify that rated output at those extremes before sizing. R-454B is a low-global-warming-potential refrigerant that is becoming the industry standard as R-410A phases out, so parts and service compatibility going forward is a real advantage. The 12-year warranty ships with the unit at no dealer markup, which is unusual and represents real cost savings over brands that require paid registration or dealer-installed activation for full coverage.
The ACiQ Extreme+ 5-ton delivers a genuine high-efficiency, cold-climate heat pump at a price point that undercuts comparable Carrier, Trane, and Lennox systems by a meaningful margin. The trade-off is that ACiQ is a newer brand with limited long-term reliability data and a service model that depends entirely on independent contractors rather than a factory-trained dealer network. Buyers who are price-sensitive, have a reliable independent HVAC contractor lined up, and can tolerate some uncertainty about long-term parts availability will find real value here.
Overall score is the average of the five ratings above.
What we like
- 17.5 SEER2 puts it in the high-efficiency tier, qualifying for federal tax credits and some utility rebates
- Cold-climate rating to -22 degrees F makes it viable as a primary heating source in northern climates
- 12-year warranty at no extra cost is longer and less restrictive than most name-brand competitors
- R-454B refrigerant is forward-compatible with evolving EPA regulations, avoiding a forced system change later
- Factory-direct pricing typically undercuts equivalent-spec name-brand systems by a substantial margin
Trade-offs
- Consumer Reports has not yet ranked ACiQ due to insufficient long-term data, so reliability is unproven over 10-plus years
- The actual manufacturer is undisclosed, making it harder for contractors to cross-reference parts, service bulletins, or compressor history
- No factory dealer network means warranty service depends on finding an independent contractor willing to work on the brand
- At 5 tons, this is a large, expensive system, and the stakes of a reliability or parts-availability problem are higher than with a smaller unit
What homeowners and pros say about ACiQ
Early owner feedback on ACiQ systems, collected across Google dealer reviews and independent HVAC forums, points to quiet operation and solid first-year performance as the most consistent themes. Contractors who have installed the brand report that the inverter systems commission without unusual difficulty and that phone support from ACiQ has been responsive when questions arise. Consumer Reports has not yet assigned ACiQ a reliability score because the brand is too new to the market to have the years of owner data their methodology requires, and that absence of an independent long-term track record is the honest caveat that any buyer at this price point needs to sit with before committing to a 5-ton system.
The specific failure-mode picture for ACiQ is still forming. Because the manufacturer is not disclosed, it is not possible to cross-reference compressor or coil failure rates against sister brands the way you can with a Carrier or Trane unit whose components are well-documented in technician forums. Independent contractors flag that sourcing replacement parts outside of ACiQ’s direct channel can be slower than with brands whose components are stocked at local HVAC supply houses. For a 5-ton system that represents a major investment, those service-network realities are worth weighing alongside the genuine advantages of the efficiency rating, the cold-climate heating capability, and the 12-year warranty that comes included rather than priced separately.
Sources: Consumer Reports heat pump ratings, HVACDirect on the ACiQ brand, AHRI Directory of Certified Product Performance, U.S. DOE appliance and equipment efficiency standards.
What it costs to run
At 17.5 SEER2, cooling this 5-ton system for a typical 1200-hour cooling season at the U.S. average electricity rate of $0.17/kWh works out to roughly $699 per year in cooling, about $214 less per year than a minimum-efficiency 13.4 SEER2 unit of the same size. Your real cost depends on your climate and local rate.
Method: (60,000 BTU/hr ÷ 17.5 SEER2) × 1200 hours ÷ 1000 × $0.17/kWh. Rate source: U.S. EIA average; cooling hours: moderate-climate estimate.
How it compares
| Brand | Comparable model | SEER2 | Stage | Price position |
|---|---|---|---|---|
| ACiQ | Extreme+ Series 5-Ton R-454B Inverter Heat Pump | 17.5 | Variable | Value pick |
| Carrier | Infinity 20 Heat Pump (25VNA0) | Up to 20 SEER2 | Variable | Significantly higher than ACiQ |
| Trane | XV20i Variable Speed Heat Pump (4TWV0) | Up to 20 SEER2 | Variable | Significantly higher than ACiQ |
| Lennox | XP21 Heat Pump | Up to 17.5 SEER2 | Variable | Moderately to significantly higher than ACiQ |
Competitor rows are comparable single-stage units at similar efficiency; price is relative position, not a quote.
Questions about this system
Will my regular HVAC contractor be able to service this unit, and can they get parts?
Any licensed HVAC technician certified for R-454B refrigerant can work on the system mechanically. The challenge is that because the actual manufacturer is not publicly disclosed, contractors cannot easily look up service bulletins or cross-reference parts through standard supply channels, which can slow down a repair. It is worth confirming your contractor is comfortable with the brand before purchasing.
Is 17.5 SEER2 high enough to qualify for the federal heat pump tax credit?
The current federal Energy Efficient Home Improvement Credit (25C) requires split heat pumps to meet or exceed 15.2 SEER2 and 8.1 HSPF2, and ACiQ rates this system above those thresholds. You should verify current IRS guidance and the system's AHRI certificate at time of purchase, since requirements and credit amounts can change.
How does the -22 degree F heating rating work in practice for a cold climate?
The -22 degree F figure refers to the lowest ambient temperature at which the system can still produce some heat output, not the temperature at which it produces full rated capacity. Actual heating capacity drops as outdoor temperatures fall, so a Manual J load calculation for your specific home and local design temperatures is important before relying on this unit as a sole heat source in a very cold climate.
What does the 12-year warranty actually cover, and are there any conditions?
ACiQ's 12-year warranty covers parts and the compressor and is included with purchase without requiring dealer installation for activation, which is a meaningful difference from brands that require dealer registration. You should read the warranty document carefully for any requirements around licensed installation or maintenance records, since most HVAC warranties are voided by improper installation regardless of brand.
Why does ACiQ cost less than Carrier or Trane at the same SEER2 rating?
ACiQ is AC Direct's house brand, sold factory-direct without a dealer distribution layer, which removes markup at multiple points in the supply chain. Forum discussions suggest the equipment may share a manufacturing lineage with larger HVAC groups, though this is unconfirmed. The lower price reflects the distribution model and the brand's lack of the marketing and dealer infrastructure that established brands carry in their pricing.
Specifications
| Cooling capacity | 5 Ton |
| Efficiency | 17.5 SEER2 |
| Refrigerant | R-454B |