ACiQ / ACiQ Extreme
ACiQ Extreme 24k R-454B 208/230V Mini-Split
The two-ton flagship Extreme unit runs R-454B on 230V with 21 SEER2, 13 EER2, and a top-of-line 13.5 HSPF2, ENERGY STAR certified and cold-climate designated. Its certified heating is 29,000 BTU at 47F, 22,200 BTU at 17F and 24,200 BTU at 5F, a strong 5F figure for a two-ton unit.
1 zoneProfessional installCurrent
Refrigerant generation
R-454B - current-generation refrigerant
Paid link
$2,400 / Checked Jul 26, 2026
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Image: ACiQ
Data completeness: 85%
- Last sourced
- Jul 26, 2026
SplitAtlas score
8.8 / 10
Cooling efficiencyBelow average
(21.0 SEER2) among 24k systems
Heating efficiencyTop 10%
(13.5 HSPF2) among 24k systems
Cold-weather performanceAbove average
(5F certified capacity: 83.4% of the 47F rating; -22 F heating floor) among 24k systems
WarrantyTop 10%
(7 yr parts / 12 yr compressor) across the catalogue
Feature setAbove average
(5 verified features) across the catalogue
Price-to-performanceBelow average
($2,400 median retail) among 24k systems
Documentation & partsBelow average
(6 manuals; spec sheet) across the catalogue
Not evaluated
- Installation accessibility — not applicable (professional install)N/A
professional install - DIY-accessibility not applicable
Key ratings
Best-fit use cases
The choice for a large living space on 230V in a harsh winter climate that needs two tons of heat which actually intensifies as temperatures fall.
Buyer review snapshot
Install difficulty
Professional install
- Electrical: 230V; MCA 24.9 A; breaker/fuse 25 A.
- Line set: connection type not sourced; precharged 25 ft.
Alternatives
- Blueridge XS3 High Efficiency 24,000 BTU R-454B 208/230V (BXAFA24WM0 / BXS3A24SC0)
8.9 score / 24k / SEER2 23 / -13 F heating floor / 230V
Exact destination at Alpine Home Air: $1,939.00, checked Jul 24, 2026
Availability and price context
- Last seen at HVACDirect on Jul 26, 2026: $2,399.99. Open the listing for today's price.
Source date
- Model data sourced
- Jul 26, 2026
- Page reviewed
- Jul 26, 2026
- Source-backed records
- 3
- Newest source retrieved
- Jul 26, 2026
Warranty tiers
- Registered
- 7 yr parts / 12 yr compressor - published per-line terms with online registration
The score uses Registered. Additional published terms are shown for reference and not counted in the score.
Strengths
- Certified at 24,200 BTU at 5F, above its 22,200 BTU 17F figure - strong deep-cold capacity.
- Best-in-lineup 13.5 HSPF2, ENERGY STAR certified and cold-climate designated, for efficient two-ton cold-climate heat.
Weaknesses
- SEER2 of 21 is modest for the flagship tier, reflecting a design tuned toward heating over peak cooling efficiency.
- Even the top ACiQ unit carries the value brand's thinner dealer and support network.
Climate suitability
- Minimum heating ambient
- -22 F[1]
- Certified heating at 5F
- 24,200 BTU/h[2]
- Rated heating at 17F
- 22,200 BTU/h[2]
- Rated heating at 47F
- 29,000 BTU/h[2]
Specifications
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- Manufacturer
- ACiQ
- Brand
- ACiQ
- Product line
- ACiQ Extreme
- Model number
- ACIQ-24W-HH-MD indoor / ACIQ-24ZPL-HP230C outdoor
- Indoor unit model
- ACIQ-24W-HH-MD
- Outdoor unit model
- ACIQ-24ZPL-HP230C
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 24,000 BTU/h[2]
- Rated heating capacity
- 29,000 BTU/h[2]
- Voltage
- 230 V[1]
- MCA
- 24.9 A[1]
- Maximum fuse or breaker size
- 25 A[1]
- Breaker needed
- not published
- SEER2
- 21 SEER2[2]
- EER2
- 13 EER2[2]
- HSPF2 (Region 4)
- 13.5 HSPF2[2]
- HSPF2 (Region 5)
- not published
- COP
- not published
- COP at 47F
- not published
- COP at 5F
- 2.34 COP[2]
- Minimum outdoor heating temperature
- -22 F[1]
- Minimum outdoor cooling temperature
- -22 F[1]
- Maximum outdoor temperature
- 122 F[1]
- Indoor noise range
- not published
- Outdoor noise rating
- 61.5 dBA[1]
- Indoor weight
- not published
- Outdoor weight
- 141.31 lb[1]
- Refrigerant
- R-454B[2]
- Refrigerant charge
- not published
- Manufacturer coverage
- not published
- Line-set size
- 3/8 in liquid / 5/8 in suction
- Included line-set length
- Line set length is selected as an accessory on this HVACDirect system page.
- Maximum line-set length
- not published
- Max line set per indoor
- not published
- Maximum elevation difference
- not published
- Max height between indoor units
- not published
- Wi-Fi support
- supported[1]
- Energy Star status
- ENERGY STAR certified[3]
- AHRI certification number
- 216032337[2]
- Warranty
- Registered: 7 yr parts / 12 yr compressor (published per-line terms with online registration). Score uses Registered.. 12-year compressor / 7-year parts with online registration
- Install path
- Professional install
- Retail price
- $2,399.99
- Available retailers
- HVACDirect
- Manual links
- AHRI public directory record 216032337, ENERGY STAR exact check 216032337, 24,000 BTU ACiQ Extreme 21 SEER2 Single Zone Wall Mount Mini Split Heat Pump System - R454B | 230V HVACDirect installation resources listing, 24,000 BTU ACiQ Extreme 21 SEER2 Single Zone Wall Mount Mini Split Heat Pump System - R454B | 230V, 24,000 BTU ACiQ Extreme 21 SEER2 Single Zone Wall Mount Mini Split Heat Pump System - R454B | 230V HVACDirect product specification grid
- Specification sheet
- 24,000 BTU ACiQ Extreme 21 SEER2 Single Zone Wall Mount Mini Split Heat Pump System - R454B | 230V HVACDirect product specification grid
- Last sourced date
- Jul 26, 2026
Retail purchase context
Some retailer links may earn us a commission at no extra cost; paid relationships never change scores or recommendations. Affiliate disclosure
Paid link
$2,400 at HVACDirect
$2,400 / Checked Jul 26, 2026
Installation considerations
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- Liquid line
- 3/8 in[1]
- Suction line
- 5/8 in[1]
- Line connection type
- not published
- Precharged length
- 25 ft[1]
- Included line-set length
- Line set length is selected as an accessory on this HVACDirect system page.
- Maximum line-set length
- not published
- Max line set per indoor
- not published
- Max height between indoor units
- not published
- Indoor dimensions
- not published
- Outdoor dimensions
- 37.24 x 31.89 x 16.14 in[1]
- Indoor weight
- not published
- Outdoor weight
- 141.31 lb[1]
- Drain size
- not published
Related systems and guides
- More ACiQ systems
- ACiQ Essentials 24k R-32 208/230V Mini-Split
- ACiQ Essentials 24k R-32 208/230V 3-Zone Mini-Split
- Senville AURA 23.4k Four-Way Cassette R-454B 208/230V Mini-Split
- ACiQ Standard 24k R-454B 208/230V Mini-Split
- Guide library
- Mini split buying guide
- Single-zone vs multi-zone mini splits
- Troubleshooting
- Do mini splits work in cold weather?
- ACiQ mini split review: is ACiQ any good?
- The best 24,000 BTU mini splits of 2026
- The best cold-climate mini splits of 2026
- The best mini splits for heating of 2026
- Mini split heating capacity in the cold: what your unit actually delivers at 5F
- The mini split defrost cycle, explained
- The best DIY mini splits of 2026
- What "DIY mini split" actually means
- How to install a mini split (DIY overview)
- Mini split not heating
- Mini split indoor unit freezing up
- Mini split remote not working
- Mini split outdoor unit not running
- Mini split Wi-Fi not connecting
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the ACiQ Extreme 24,000 BTU R-454B 208/230V (ACIQ-24W-HH-MD / ACIQ-24ZPL-HP230C) myself, or do I need a pro?
- ACiQ Extreme 24,000 BTU R-454B 208/230V (ACIQ-24W-HH-MD / ACIQ-24ZPL-HP230C) is built for professional installation: the line set must be flared, evacuated, and charged, which requires EPA-certified refrigerant handling. Installing it outside the manufacturer's requirements can void the warranty, so budget for a qualified HVAC installer.
- Will the ACiQ Extreme 24,000 BTU R-454B 208/230V (ACIQ-24W-HH-MD / ACIQ-24ZPL-HP230C) keep heating in a cold winter?
- The AHRI/ENERGY STAR certification lists 24,200 BTU/h of heating capacity at 5F. Rated heating operation extends down to -22 F. Certified heating efficiency is 13.5 HSPF2. Match those numbers against your climate's design temperature - in cold regions, output at 5F matters far more than the nameplate capacity measured at 47F.
- What electrical circuit does the ACiQ Extreme 24,000 BTU R-454B 208/230V (ACIQ-24W-HH-MD / ACIQ-24ZPL-HP230C) need?
- Published electrical requirements: 230 V voltage, 24.9 A minimum circuit ampacity, and 25 A maximum breaker or fuse sizing. Confirm the final circuit against the unit nameplate and local code with a licensed electrician.
- What warranty does the ACiQ Extreme 24,000 BTU R-454B 208/230V (ACIQ-24W-HH-MD / ACIQ-24ZPL-HP230C) carry?
- The manufacturer publishes these warranty tiers: Registered: 7 yr parts / 12 yr compressor (published per-line terms with online registration). Score uses Registered.. Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.
Data sources
ShowHide
- HVACDirect / ACiQ: 24,000 BTU ACiQ Extreme 21 SEER2 Single Zone Wall Mount Mini Split Heat Pump System - R454B | 230VSourced - manufacturer product page
Covers Frequency, Maximum breaker size, Maximum fuse size, Minimum circuit ampacity, Phase, Voltage and more
- Air-Conditioning, Heating, and Refrigeration Institute: AHRI Appendix M1 public detail for ACIQ-24ZPL-HP230C / ACIQ-24W-HH-MDSourced - AHRI directory
Covers AHRI certification number, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity, HSPF2 (Region 4) and more
- ENERGY STAR: ENERGY STAR exact row check for AHRI 216032337Sourced - Energy Star listing
Covers Energy Star status
Last updated
Jul 26, 2026