ACiQ / Multi-Zone Standard Series
ACiQ Standard 27k R-454B 208/230V 3-Zone Mini-Split
The ACiQ Multi-Zone Standard Series 3-Zone 27k is the middle R-454B line with three heads on one 208/230V outdoor unit. It is stocked/purchasable, a priced condenser you can buy rather than a dealer quote, with professional installation still required.
Certified numbers are SEER2 25, EER2 13, HSPF2 9.5, and it is ENERGY STAR certified and AHRI cold-climate designated. Cooling capacity is 27000 BTU.
Heating falls through the cold - 27000 BTU at 47F, down to 23600 at 17F and 19000 at 5F.
Refrigerant generation
R-454B - current-generation refrigerant
Paid link
$2,050 / Fresh price - checked Jul 29, 2026
Need this installed?
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Image: HVACDirect
- Last sourced
- Jul 29, 2026
SplitAtlas score
8.5 / 10
(25.0 SEER2) among 24k systems
(9.5 HSPF2) among 24k systems
(70.4% heat retained at 5F; -13 F heating floor) among 24k systems
(7 yr parts / 12 yr compressor) across the catalogue
(6 verified features) across the catalogue
($2,050 median retail) among 24k systems
(9 manuals; spec sheet) across the catalogue
Not evaluated
- Installation accessibility — not applicable (professional install)N/A
professional install - DIY-accessibility not applicable
Key ratings
Buyer review snapshot
Best for / skip if
Best for
- 3-zone projects in the 24k outdoor capacity class.
- Top efficiency shortlists; SEER2 is 25.
Install difficulty
- Electrical: 230V; MCA 23 A; breaker/fuse 25 A.
- Line set: connection type not sourced; precharged 24.6 ft; max 262.4 ft.
- 3-zone condenser; indoor-head matching and branch layout are part of the job.
Availability and price context
- Verified current price: $2,049.99 at HVACDirect; availability In Stock - 407 Ready to Ship; checked Jul 29, 2026.
Source date
- Model data sourced
- Jul 29, 2026
- Page reviewed
- Jul 29, 2026
- Source-backed records
- 5
- Newest source retrieved
- Jul 29, 2026
Warranty tiers
Warranty: 7 years parts and 12 years compressor as standard.
Model context
- Install path
- This is professional-install equipment; retail offer context is shown separately from installation labor.
- Structured ratings
- Certification: ENERGY STAR certified, ENERGY STAR cold-climate certified and AHRI cold-climate designated. Refrigerant: current low-GWP R-454B. Minimum heating ambient: -13 F.
Strengths
- Certified SEER2 25 / EER2 13 / HSPF2 9.5.
- Three zones on one buyable, priced R-454B condenser.
- Holds most of its heat into the teens - 23600 BTU at 17F.
Weaknesses
- Heating falls to 19000 BTU by 5F, below the 27000 at 47F.
- Middle-line HSPF2 9.5 trails the Extreme series.
Climate suitability
- Minimum heating ambient
- -13 F[1]
- Rated heating at 5F
- 19,000 BTU/hNon-Ducted Indoor Units[3]
- Rated heating at 17F
- 23,600 BTU/hNon-Ducted Indoor Units[3]
- Rated heating at 47F
- 27,000 BTU/hNon-Ducted Indoor Units[3]
Specifications
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- Manufacturer
- ACiQ
- Brand
- ACiQ
- Product line
- Multi-Zone Standard Series
- Model number
- ES-27Z-M4C
- Indoor unit model
- Indoor heads are selected separately on a multi-zone system
- Outdoor unit model
- ES-27Z-M4C
- Number of zones
- 3
- Max indoor units
- 3 units[2]
- Rated cooling capacity
- 27,000 BTU/hNon-Ducted Indoor Units[3]
- Rated heating capacity
- 27,000 BTU/hNon-Ducted Indoor Units[3]
- Voltage
- 230 V[1]
- MCA
- 23 A[1]
- Maximum fuse or breaker size
- 25 A[1]
- Breaker needed
- not published
- SEER2
- 25 SEER2Non-Ducted Indoor Units[3]
- EER2
- 13 EER2Non-Ducted Indoor Units[3]
- HSPF2 (Region 4)
- 9.5 HSPF2Non-Ducted Indoor Units[3]
- HSPF2 (Region 5)
- Certified per indoor-unit combination, not per outdoor unit
- COP
- not published
- COP at 47F
- not published
- COP at 5F
- 2 COPNon-Ducted Indoor Units[3]
- Minimum outdoor heating temperature
- -13 F[1]
- Minimum outdoor cooling temperature
- -13 F[1]
- Maximum outdoor temperature
- 122 F[1]
- Indoor noise range
- Indoor heads are selected separately on a multi-zone system
- Outdoor noise rating
- 61 dBA[1]
- Indoor weight
- Indoor heads are selected separately on a multi-zone system
- Outdoor weight
- 138.89 lb[1]
- Refrigerant
- R-454B[3]
- Refrigerant charge
- 84.66 oz[1]
- Manufacturer coverage
- not published
- Line-set size
- 4 x 1/4 in liquid / 3 x 3/8 in + 1 x 1/2 in suction
- Included line-set length
- Indoor heads are selected separately on a multi-zone system
- Maximum line-set length
- 262.4 ft[1]
- Max line set per indoor
- 114.8 ft[1]
- Maximum elevation difference
- 49.2 ft[1]
- Max height between indoor units
- ACiQ R-454B submittal extraction for this outdoor-only condenser did not publish a universal indoor-to-indoor height limit; selected indoor configuration governs.
- Wi-Fi support
- Indoor heads are selected separately on a multi-zone system
- Energy Star status
- ENERGY STAR certified[4]
- AHRI certification number
- 216032379Non-Ducted Indoor Units[3]
- Warranty
- Standard: 7 yr parts / 12 yr compressor (published per-line ACiQ registration terms). 12-year compressor / 7-year parts warranty with ACiQ registration terms.
- Install path
- Professional install
- Retail price
- $2,049.99
- Available retailers
- HVACDirect
- Manual links
- AHRI public detail 216032379, ACiQ R454B Multi-Zone Compatibility Chart, ENERGY STAR exact lookup 216032379, ACiQ multi-zone installation and owner manual, ACiQ Multi-Zone Standard Series official category for ES-27Z-M4C, HVACDirect exact condenser listing for ES-27Z-M4C, HVACDirect exact-offer audit for ES-27Z-M4C, ACiQ multi-zone service manual, ACiQ ES-27Z-M4C non-ducted multi-zone submittal
- Specification sheet
- ACiQ ES-27Z-M4C non-ducted multi-zone submittal
- Last sourced date
- Jul 29, 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
$2,050 / Fresh price - checked Jul 29, 2026
Compatible indoor units
This is an outdoor unit. You choose its indoor heads separately - up to the maximum this condenser supports - and you can mix room sizes and styles across the zones. The models below are the heads this unit is documented to pair with.
Ceiling cassette air handlers
9k, 12k, 18k, 24k
Model numbers
- 9k: ACiQ-09CC-HH-MC
- 12k: ACiQ-12CC-HH-MC
- 18k: ACiQ-18CC-HH-MC
- 24k: ACiQ-24CC-HH-MC
Concealed duct air handlers
9k, 12k, 18k, 24k
Model numbers
- 9k: ACiQ-09CD-HH-MC
- 12k: ACiQ-12CD-HH-MC
- 18k: ACiQ-18CD-HH-MC
- 24k: ACiQ-24CD-HH-MC
Ducted air handlers
18k, 24k
Model numbers
- 18k: ACiQ-18AHB-HH-MB
- 24k: ACiQ-24AHB-HH-MB
Floor console / floor-ceiling air handlers
9k, 12k, 18k, 24k
Model numbers
- 9k: ACiQ-09FM-HH-MD
- 12k: ACiQ-12FM-HH-MD
- 18k: ACiQ-18FM-HH-MD
- 24k: ACiQ-24FM-HH-MD
Slim ceiling cassette air handlers
18k
Model numbers
- 18k: SCC-18-HH-MB
Wall-mounted air handlers
6k, 9k, 12k, 18k, 24k
Model numbers
- 6k: ACiQ-06W-HH-MD
- 9k: ACiQ-09W-HH-MD
- 12k: ACiQ-12W-HH-MD
- 18k: ACiQ-18W-HH-MD
- 24k: ACiQ-24W-HH-MD
Sizing note: do not just add up the rooms. Multi-zone condensers have a maximum total connected capacity, and connecting more head capacity than the unit is rated for is a common installer mistake that hurts efficiency and comfort. Match total head capacity to the condenser's rating.
Installation considerations
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- Liquid line
- 4 x 1/4 in[1]
- Suction line
- 3 x 3/8 in + 1 x 1/2 in[1]
- Line connection type
- not published
- Precharged length
- 24.6 ft[1]
- Included line-set length
- Indoor heads are selected separately on a multi-zone system
- Maximum line-set length
- 262.4 ft[1]
- Max line set per indoor
- 114.8 ft[1]
- Max height between indoor units
- ACiQ R-454B submittal extraction for this outdoor-only condenser did not publish a universal indoor-to-indoor height limit; selected indoor configuration governs.
- Indoor dimensions
- Indoor heads are selected separately on a multi-zone system
- Outdoor dimensions
- 37.24 x 16.14 x 31.89 in[1]
- Indoor weight
- Indoor heads are selected separately on a multi-zone system
- Outdoor weight
- 138.89 lb[1]
- Drain size
- not published
Related systems and guides
- More ACiQ systems
- ACiQ sibling model
- XM1 Core 27k
- ACiQ sibling model
- Klimaire comparison model
- 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 multi-zone mini splits of 2026
- The best 3-zone mini splits of 2026
- How to size a multi-zone mini split
- Not every multi-zone condenser lets you mix head types
- How much does a multi-zone mini split cost?
- 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
- One room won't heat or cool on a multi-zone mini split
- Mini split not heating
- Mini split indoor unit freezing up
- Mini split not cooling
- Mini split weak airflow
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the ACiQ Multi-Zone Standard Series 3-Zone 27,000 BTU R-454B 208/230V (ES-27Z-M4C) myself, or do I need a pro?
- ACiQ Multi-Zone Standard Series 3-Zone 27,000 BTU R-454B 208/230V (ES-27Z-M4C) 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 Multi-Zone Standard Series 3-Zone 27,000 BTU R-454B 208/230V (ES-27Z-M4C) keep heating in a cold winter?
- The manufacturer publishes 19,000 BTU/h of heating output at 5F. Rated heating operation extends down to -13 F. Certified heating efficiency is 9.5 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 Multi-Zone Standard Series 3-Zone 27,000 BTU R-454B 208/230V (ES-27Z-M4C) need?
- Published electrical requirements: 230 V voltage, 23 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.
- How far can the outdoor unit be from the indoor head?
- The published maximum line-set length is 262.4 ft, and the included line set comes pre-charged for 24.6 ft. Longer runs than the included set allows typically mean added refrigerant and a pro visit, so measure the planned routing before ordering.
- What warranty does the ACiQ Multi-Zone Standard Series 3-Zone 27,000 BTU R-454B 208/230V (ES-27Z-M4C) carry?
- The manufacturer publishes these warranty tiers: Standard: 7 yr parts / 12 yr compressor (published per-line ACiQ registration terms). Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.
Data sources
ShowHide
- ACiQ: ACiQ ES-27Z-M4C non-ducted multi-zone submittalSourced - manufacturer technical document
Covers Frequency, Maximum breaker size, Maximum fuse size, Minimum circuit ampacity, Phase, Voltage and more
- ACiQ: ACiQ Multi-Zone Standard Series official categorySourced - manufacturer product page
Covers Max indoor units, product_line.name
- AHRI certificate #216032379 - search the AHRI DirectorySourced - AHRI directory
Covers AHRI certification number, performance_spec.cold_climate_designation, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity and more
- ENERGY STAR: ENERGY STAR exact row check for AHRI 215735288Sourced - Energy Star listing
Covers performance_spec.energy_star_cold_climate, Energy Star status
- HVACDirect: HVACDirect exact condenser listing for ES-27Z-M4CSourced - retailer listing
Covers Retail price
- ACiQ R454B Multi-Zone Compatibility ChartSourced - manual
Covers Manual links
Last updated
Jul 29, 2026