ACiQ / ACiQ Standard
ACiQ Standard 18k R-454B 208/230V Mini-Split
This ton-and-a-half Standard unit runs R-454B on 230V and posts a strong 24 SEER2, 13.5 EER2, and 11.1 HSPF2. It is ENERGY STAR certified and cold-climate designated. Heating is dependable across the range: 18,000 BTU at 47F, 15,000 BTU at 17F, and 13,000 BTU at 5F, so it carries substantial load deep into winter.
1 zoneProfessional installCurrent
Refrigerant generation
R-454B - current-generation refrigerant
Paid link
$1,300 / Checked Jul 26, 2026
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Image: HVACDirect
Data completeness: 93%
- Last sourced
- Jul 26, 2026
SplitAtlas score
9.0 / 10
Cooling efficiencyTop quartile
(24.0 SEER2) among 18k systems
Heating efficiencyTop quartile
(11.1 HSPF2) among 18k systems
Cold-weather performanceBelow average
(5F certified capacity: 72.2% of the 47F rating; -13 F heating floor) among 18k systems
NoiseTop quartile
(20 dBA indoor min / 59 dBA outdoor) among 18k systems
WarrantyTop 10%
(7 yr parts / 12 yr compressor) across the catalogue
Feature setAbove average
(5 verified features) across the catalogue
Price-to-performanceTop quartile
($1,300 median retail) among 18k 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
Well suited to a large room or open living area on 230V in a cold climate that needs efficient, certified heating with real low-temperature carry.
Buyer review snapshot
Best for / skip if
Best for
- High-efficiency shortlists; SEER2 is 24.
Install difficulty
Professional install
- Electrical: 230V; MCA 18 A; breaker/fuse 20 A.
- Line set: connection type not sourced; precharged 25 ft.
Alternatives
- Blueridge XS6 Max Efficiency 18,000 BTU R-454B 208/230V (BXS6A18WM0 / BXS6A18UC0)
9.2 score / 18k / SEER2 25.6 / -22 F heating floor / 230V
Exact destination at Alpine Home Air: $2,359.00, checked Jul 24, 2026
Availability and price context
- Last seen at HVACDirect on Jul 26, 2026: $1,299.99. 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
- Cold-climate designated and ENERGY STAR certified while holding 15,000 BTU at 17F and 13,000 BTU at 5F.
- 24 SEER2 with 13.5 EER2 gives it efficient cooling to match its strong heating.
Weaknesses
- Premium-tier pricing sits above the Essentials and Base options at the same capacity.
- Value-brand service network is lighter than the premium cold-climate field.
Climate suitability
- Minimum heating ambient
- -13 F[1]
- Certified heating at 5F
- 13,000 BTU/h[2]
- Rated heating at 17F
- 15,000 BTU/h[2]
- Rated heating at 47F
- 18,000 BTU/h[2]
Specifications
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- Manufacturer
- ACiQ
- Brand
- ACiQ
- Product line
- ACiQ Standard
- Model number
- ACIQ-18WS-HP230C indoor / ACIQ-18ZS-HP230C outdoor
- Indoor unit model
- ACIQ-18WS-HP230C
- Outdoor unit model
- ACIQ-18ZS-HP230C
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 18,000 BTU/h[2]
- Rated heating capacity
- 18,000 BTU/h[2]
- Voltage
- 230 V[1]
- MCA
- 18 A[1]
- Maximum fuse or breaker size
- 20 A[1]
- Breaker needed
- not published
- SEER2
- 24 SEER2[2]
- EER2
- 13.5 EER2[2]
- HSPF2 (Region 4)
- 11.1 HSPF2[2]
- HSPF2 (Region 5)
- not published
- COP
- not published
- COP at 47F
- not published
- COP at 5F
- 2.35 COP[2]
- Minimum outdoor heating temperature
- -13 F[1]
- Minimum outdoor cooling temperature
- -13 F[1]
- Maximum outdoor temperature
- 122 F[1]
- Indoor noise range
- 20 / 54 dB(A)[1]
- Outdoor noise rating
- 59 dBA[1]
- Indoor weight
- 39.68 lb[1]
- Outdoor weight
- 100.31 lb[1]
- Refrigerant
- R-454B[2]
- Refrigerant charge
- not published
- Manufacturer coverage
- not published
- Line-set size
- 1/4 in liquid / 1/2 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
- 216980869[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
- $1,299.99
- Available retailers
- HVACDirect
- Manual links
- AHRI public directory record 216980869, ENERGY STAR exact check 216980869, 18,000 BTU ACiQ Standard 24 SEER2 Single Zone Wall Mount Mini Split Heat Pump System - R454B | 230V HVACDirect installation resources listing, 18,000 BTU ACiQ Standard 24 SEER2 Single Zone Wall Mount Mini Split Heat Pump System - R454B | 230V, 18,000 BTU ACiQ Standard 24 SEER2 Single Zone Wall Mount Mini Split Heat Pump System - R454B | 230V HVACDirect product specification grid
- Specification sheet
- 18,000 BTU ACiQ Standard 24 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
$1,300 at HVACDirect
$1,300 / Checked Jul 26, 2026
Installation considerations
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- Liquid line
- 1/4 in[1]
- Suction line
- 1/2 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
- 42.60 x 13.27 x 9.21 in[1]
- Outdoor dimensions
- 35.04 x 26.50 x 13.46 in[1]
- Indoor weight
- 39.68 lb[1]
- Outdoor weight
- 100.31 lb[1]
- Drain size
- not published
Related systems and guides
- More ACiQ systems
- ACiQ Standard 18k R-454B 208/230V 2-Zone Mini-Split
- Blueridge DM1 DIY 18k R-454B 208/230V 3-Zone Mini-Split
- ACiQ Extreme 18k R-454B 208/230V 2-Zone Mini-Split
- ACiQ Extreme 18k 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 18,000 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 making loud noise
- One room won't heat or cool on a multi-zone mini split
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the ACiQ Standard 18,000 BTU R-454B 208/230V (ACIQ-18WS-HP230C / ACIQ-18ZS-HP230C) myself, or do I need a pro?
- ACiQ Standard 18,000 BTU R-454B 208/230V (ACIQ-18WS-HP230C / ACIQ-18ZS-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 Standard 18,000 BTU R-454B 208/230V (ACIQ-18WS-HP230C / ACIQ-18ZS-HP230C) keep heating in a cold winter?
- The AHRI/ENERGY STAR certification lists 13,000 BTU/h of heating capacity at 5F. Rated heating operation extends down to -13 F. Certified heating efficiency is 11.1 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 Standard 18,000 BTU R-454B 208/230V (ACIQ-18WS-HP230C / ACIQ-18ZS-HP230C) need?
- Published electrical requirements: 230 V voltage, 18 A minimum circuit ampacity, and 20 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 Standard 18,000 BTU R-454B 208/230V (ACIQ-18WS-HP230C / ACIQ-18ZS-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: 18,000 BTU ACiQ Standard 24 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-18ZS-HP230C / ACIQ-18WS-HP230CSourced - 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 216980869Sourced - Energy Star listing
Covers Energy Star status
Last updated
Jul 26, 2026