Brand guide · United States · checked October 19, 2026
ACiQ heat pumps
ACiQ is made by 1HVAC (Troy, Ohio), which lists ACiQ under 'Our Brands'. ENERGY STAR lists 162 ACiQ outdoor models certified for the US, 121 of them cold-climate, and its best certified pairing heats at a COP of 2.60 at 5°F.
ACiQ at a glance
- Who owns it
- 1HVAC (Troy, Ohio), which lists ACiQ under 'Our Brands'. The ENERGY STAR partner for ACiQ mini-splits is '1HVAC Energy, LLC' and ACiQ's warranty address is 250 Northwoods Blvd, Vandalia, Ohio. Carrier makes the ducted split systems (see manufacturing). No ownership link to Ferguson was found, and no 2024-2026 ownership change was found.
- Sister brands
- STEALTH, DIYCOOL, PolarWave, InfinityLiving
- Headquarters
- Troy, Ohio, USA
- Where it's made
- Ducted AC and heat pump condensers: Carrier's International Comfort Products. The ACiQ condenser warranty is issued by ICP, 'A Carrier Company', and ENERGY STAR lists Carrier Corporation as the certifying partner for thousands of ACiQ split-system combinations. Plant location not stated. Mini-split maker not disclosed.
- How it's sold
- Contractors and online
- Price tier
- Budget. ACiQ states its mission as 'high-quality and high value heating and cooling to the public' and sells through online retailers (HVAC Direct, Amazon, OnlineSupply and others) with published prices. No price survey was cited.
- What it makes
- ductless mini-split, multi-zone, ducted mini-split, ducted central, packaged
- Names on ENERGY STAR's list
- 1HVAC, ACiQ (certified by 1HVAC Energy, LLC; Carrier Corporation; Perfect Aire, LLC)
Product lines
The current residential heat pump lines we found on ACiQ's own pages, with the low-temperature claim in the maker's words. 2 of 7 are sold as cold-climate.
| Line | Type | Cold-climate | Maker's low-temperature claim | Refrigerant |
|---|---|---|---|---|
| High-Efficiency Extreme Heat Series (inverter central heat pump) | ducted central | Yes | extracting heat in temperatures as low as -22 °F; Efficient heating range of -22° – 75°F | R-454B |
| Extreme (Extreme Heat) mini-split, single and multi-zone | ductless mini-split | Yes | No low-temperature figure published | — |
| Standard mini-split, single and multi-zone | ductless mini-split | No | No low-temperature figure published | — |
| Essentials mini-split | ductless mini-split | No | No low-temperature figure published | — |
| Traditional R454B Heat Pumps | ducted central | No | No low-temperature figure published | R-454B |
| High-Efficiency Top Discharge Inverter Heat Pump R32 | ducted central | No | No low-temperature figure published | R-32 |
| Heat Pump Packaged Units | packaged | No | No low-temperature figure published | — |
Certified models with the best cold-weather numbers
From ENERGY STAR's list for the US (updated October 19, 2026): each row is one outdoor unit with its best certified pairing. 108 of 162 ACiQ outdoor models use R-454B or R-32; the tables show those.
Mini-splits and multi-splits (76 models)
| Outdoor / indoor model | Size | Heat at 5°F | COP at 5°F | HSPF2 | SEER2 | Refrigerant | AHRI # |
|---|---|---|---|---|---|---|---|
| ACIQ-24ZS-HP230C ACIQ-24W-HH-MD ACIQ Series | 25,000 BTU/h 2-ton | 19,600 BTU/h 78% of rated | 2.54 | 11.7 | 23.0 | R-454B ENERGY STAR Cold Climate | 218471560 |
| ACIQ-12ZS-HP230C ACIQ-12FM-HH-MD ACIQ Series | 12,000 BTU/h 1-ton | 8,900 BTU/h 74% of rated | 2.50 | 11.0 | 24.6 | R-454B ENERGY STAR Cold Climate | 218471570 |
| EZ-18ZPL-HP230B EZ-18W-MB EZ Series | 18,000 BTU/h 1.5-ton | 12,800 BTU/h 71% of rated | 2.44 | 11.5 | 22.5 | R-454B ENERGY STAR Cold Climate | 216980890 |
| ACIQ-06ZPL-HP230C SCC-0609-HH-MB ACIQ Series | 7,400 BTU/h 0.5-ton | 8,100 BTU/h 110% of rated | 2.40 | 12.0 | 22.0 | R-454B ENERGY STAR Cold Climate | 216032292 |
| ACIQ-18ZS-HP230C ACIQ-18CD-HH-MC ACIQ Series | 20,000 BTU/h 1.5-ton | 14,200 BTU/h 71% of rated | 2.40 | 11.3 | 20.0 | R-454B ENERGY STAR Cold Climate | 218471567 |
| ACIQ-09ZS-HP230C ACIQ-09W-HH-MD ACIQ Series | 10,000 BTU/h 1-ton | 8,000 BTU/h 80% of rated | 2.36 | 12.5 | 25.8 | R-454B ENERGY STAR Cold Climate | 218471572 |
Central (ducted) split systems (90 models)
| Outdoor / indoor model | Size | Heat at 5°F | COP at 5°F | HSPF2 | SEER2 | Refrigerant | AHRI # |
|---|---|---|---|---|---|---|---|
| N5H8T36*K*AAA* FTMA5B60L0D* 2-STAGE 18 SEER HP | 37,600 BTU/h 3-ton | 18,600 BTU/h 50% of rated | 2.48 | 8.5 | 17.0 | R-454B | 216631656 |
| N5H8T60*K*AAA* EVM5X61M24A* 2-STAGE 18 SEER HP | 60,000 BTU/h 4.5-ton | 31,600 BTU/h 53% of rated | 2.34 | 8.5 | 16.0 | R-454B | 216631529 |
| N5H9V48*K*AAA* FTMA5B60L0D* Performance 19 SEER2 VS HP | 48,000 BTU/h 4-ton | 36,000 BTU/h 75% of rated | 2.32 | 10.0 | 19.0 | R-454B ENERGY STAR Cold Climate | 218020919 |
| N5H8T48*K*AAA* FTMA5B60L0D* 2-STAGE 18 SEER HP | 48,500 BTU/h 4-ton | 24,600 BTU/h 51% of rated | 2.32 | 8.1 | 18.0 | R-454B | 215561906 |
| ACIQ-18ZS-HP230C ACIQ-18AHB-HH-MB ACIQ Series | 18,000 BTU/h 1.5-ton | 13,000 BTU/h 72% of rated | 2.30 | 9.8 | 18.5 | R-454B ENERGY STAR Cold Climate | 218471559 |
| R5H5S48*K*AAA* F5MA5*60L*D* 15 SEER2 HP | 46,500 BTU/h 4-ton | 24,400 BTU/h 53% of rated | 2.30 | 7.8 | 15.2 | R-454B | 216629118 |
Most efficient for cooling
| Outdoor / indoor model | Size | SEER2 | EER2 | HSPF2 | COP at 5°F | Refrigerant | AHRI # |
|---|---|---|---|---|---|---|---|
| ACIQ-09ZPL-HP230C ACIQ-09W-HH-MD ACIQ Series | 12,000 BTU/h 1-ton | 27.4 | 15.4 | 12.5 | 1.80 | R-454B ENERGY STAR Cold Climate | 216032268 |
| ACIQ-09ZS-HP230C ACIQ-12FM-HH-MD ACIQ Series | 9,000 BTU/h 1-ton | 26.0 | 16.2 | 13.9 | 2.27 | R-454B ENERGY STAR Cold Climate | 218471576 |
| ACIQ-06ZPL-HP230C ACIQ-06W-HH-MD ACIQ Series | 7,000 BTU/h 0.5-ton | 25.5 | 18.0 | 14.8 | 2.39 | R-454B ENERGY STAR Cold Climate | 216032267 |
| ACIQ-12ZS-HP230C ACIQ-12W-HH-MD ACIQ Series | 12,000 BTU/h 1-ton | 25.5 | 13.0 | 10.6 | 2.30 | R-454B ENERGY STAR Cold Climate | 218471568 |
Look up any pairing by its AHRI number in the AHRI Directory ↗ or search the model in ENERGY STAR's product finder ↗. Ratings are for the exact indoor and outdoor pairing shown.
Warranty
Registration: Mini-split and High-Efficiency systems: 5 years parts / 7 years compressor, starting from the purchase date. Essentials: 3/5 years (4/6 if registered). ICP-issued AC/heat pump condensers: 5 years parts instead of 10.
Strengths and watch-outs
Strengths
- Ducted systems built by Carrier: the ICP condenser warranty is marked 'A Carrier Company', and Carrier Corporation is the ENERGY STAR partner for ACiQ split systems
- Long registered mini-split warranty: 12 years compressor / 7 years parts
- Cold-climate inverter ducted option: Extreme Heat series rated for heating down to -22°F (maker claim)
- Buy online at published prices or through authorized dealers
Watch-outs
- ACiQ's own warranty requires the whole system to be 'installed, serviced, and diagnosed by an EPA-certified technician' and installed in the US, so DIY installs and Canadian installs fall outside it
- Register within 90 days of installation; otherwise coverage drops and runs from the purchase date. Labour is never reimbursed.
- Multiple R-410A ACiQ systems are still listed on ENERGY STAR and on ACiQ's central heat pump page. Confirm a current A2L model and that it can legally be installed.
- No Canadian retailers or dealers are listed
Which rebates ACiQ models fit
Every model in these tables is ENERGY STAR certified, which is the federal equipment rule for the Home Electrification and Appliance Rebates where your state runs them. 121 ACiQ outdoor models also meet ENERGY STAR Cold Climate, which several utility programs require. The 25C tax credit ended for heat pumps placed in service after December 31, 2025.
Rebate rules by metro:
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Sources
Model counts and ratings: ENERGY STAR Certified Heat Pumps, updated October 19, 2026. Brand facts checked October 19, 2026 on:
- ACiQ product warranties
- ACiQ Standard and Extreme mini-split warranty (PDF)
- ACiQ Essentials warranty (PDF)
- ACiQ AC and heat pump condenser warranty, issued by ICP (A Carrier Company) (PDF)
- ACiQ where to buy
- ACiQ High-Efficiency Extreme Heat series
- 1HVAC home page (ACiQ and STEALTH listed under Our Brands)
- 1HVAC - About
- HVAC Direct - ACiQ brand page
- ENERGY STAR - ACIQ split systems certified by Carrier Corporation (EPA open data)