SplitAtlas

Cooper & Hunter / Hyper Multi-Zone

Cooper Hunter Hyper 18k R-454B 208/230V 3-Zone Mini-Split

Certified capacity
18,000 BTU/h[3]
SEER2
25.1 SEER2[3]
Heating floor
-13 F[2]
Voltage
230 V[2]
Install path
Professional install

The Cooper & Hunter Hyper Multi-Zone 3-Zone 18k (CH-R18MES-230VO) runs three indoor heads on one 208/230V outdoor unit, from the brand's standard Hyper line. It posts a certified nominal SEER2 of 25.1, EER2 14, and HSPF2 9.8 - the top of Cooper & Hunter's efficiency range and genuinely high for the price.

It uses current low-GWP R-454B refrigerant, is ENERGY STAR certified, and is AHRI cold-climate designated. Cooper & Hunter is a value-focused ductless brand that delivers high-efficiency inverter multi-zone below the premium names; professional installation required and units are dealer-quoted.

3 zonesProfessional installCurrent

Refrigerant generation

R-454B - current-generation refrigerant

Need this installed?

Get installation quotes
Error Codes
Cooper & Hunter Hyper Multi-Zone 3-Zone 18,000 BTU R-454B 208/230V (CH-R18MES-230VO) mini-split heat pump outdoor condenser

Image: Cooper & Hunter

Data completeness: 95%
Last sourced
Jul 28, 2026

SplitAtlas score

8.4 / 10

Methodology
Cooling efficiencyTop 10%

(25.1 SEER2) among 18k systems

Heating efficiencyAbove average

(9.8 HSPF2) among 18k systems

Cold-weather performanceBelow average

(71.1% heat retained at 5F; -13 F heating floor) among 18k systems

WarrantyBelow average

(5 yr parts / 7 yr compressor) across the catalogue

Feature setTop quartile

(6 verified features) across the catalogue

Documentation & partsBottom quartile

(8 manuals; parts channel) across the catalogue

Not evaluated

  • Installation accessibility — not applicable (professional install)N/A

    professional install - DIY-accessibility not applicable

  • Price-to-value — not evaluatedN/A

    This is a professionally installed, quote-only system, so we can't score its price. Get an installed quote to compare real cost.

    Get a quote

Key ratings

Rated cooling

18,000BTU/hNon-Ducted Indoor Units[3]

Rated heating

19,000BTU/hNon-Ducted Indoor Units[3]

Buyer review snapshot

Best for / skip if

Best for

  • 3-zone projects in the 18k outdoor capacity class.
  • Top efficiency shortlists; SEER2 is 25.1.

Install difficulty

Professional flared-line install
  • Electrical: 230V; MCA 16 A; breaker/fuse 20 A.
  • Line set: Flared line connections; precharged 75 ft; max 196.8 ft.
  • 3-zone condenser; indoor-head matching and branch layout are part of the job.

Availability and price context

We could not verify a current retail price for this model. We could not find this exact model in stock at a retailer we work with when we last checked on 2026-07-28.

Source date

Model data sourced
Jul 28, 2026
Page reviewed
Jul 28, 2026
Source-backed records
4
Newest source retrieved
Jul 28, 2026

Warranty tiers

Warranty: 5 years parts and 7 years compressor as standard.

Review methodology

Model context

Install path
This is professional-install equipment; no verified current retail offer is attached.
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

  • Three zones from one condenser cover a small home or a main living area plus two rooms.
  • Certified nominal SEER2 25.1 / EER2 14 / HSPF2 9.8 - the highest efficiency in the lineup.
  • Current low-GWP R-454B refrigerant, ENERGY STAR certified, AHRI cold-climate designated.
  • Strong value: premium-tier efficiency at a lower price point.

Weaknesses

  • Sits a notch below top premium brands on brand cachet and dealer network.
  • Heating tapers in deep cold (19000 BTU at 47F down to 13500 at 5F); buyers who want deep-cold output should look at the matching Hyper Heat 3-zone.

Climate suitability

Minimum heating ambient
-13 F[2]
Rated heating at 5F
13,500 BTU/hNon-Ducted Indoor Units[3]
Rated heating at 17F
16,000 BTU/hNon-Ducted Indoor Units[3]
Rated heating at 47F
19,000 BTU/hNon-Ducted Indoor Units[3]

Specifications

Show
Manufacturer
Cooper & Hunter
Brand
Cooper & Hunter
Product line
Hyper Multi-Zone
Model number
CH-R18MES-230VO
Indoor unit model
Indoor heads are selected separately on a multi-zone system
Outdoor unit model
CH-R18MES-230VO
Number of zones
3
Max indoor units
3 units[1]
Rated cooling capacity
18,000 BTU/hNon-Ducted Indoor Units[3]
Rated heating capacity
19,000 BTU/hNon-Ducted Indoor Units[3]
Voltage
230 V[2]
MCA
16 A[2]
Maximum fuse or breaker size
20 A[2]
Breaker needed
not published
SEER2
25.1 SEER2Non-Ducted Indoor Units[3]
EER2
14 EER2Non-Ducted Indoor Units[3]
HSPF2 (Region 4)
9.8 HSPF2Non-Ducted Indoor Units[3]
HSPF2 (Region 5)
Certified per indoor-unit combination, not per outdoor unit
COP
not published
COP at 47F
3.8 COP[2]
COP at 5F
2.3 COPNon-Ducted Indoor Units[3]
Minimum outdoor heating temperature
-13 F[2]
Minimum outdoor cooling temperature
-13 F[2]
Maximum outdoor temperature
122 F[2]
Indoor noise range
Indoor heads are selected separately on a multi-zone system
Outdoor noise rating
59.5 dBA[2]
Indoor weight
Indoor heads are selected separately on a multi-zone system
Outdoor weight
100.53 lb[2]
Refrigerant
R-454B[3]
Refrigerant charge
61.73 oz[2]
Manufacturer coverage
not published
Line-set size
3 x 1/4 in liquid / 3 x 3/8 in suction
Included line-set length
Indoor heads are selected separately on a multi-zone system
Maximum line-set length
196.8 ft[2]
Max line set per indoor
98.4 ft[2]
Maximum elevation difference
49.2 ft[2]
Max height between indoor units
33 ft[2]
Wi-Fi support
Indoor heads are selected separately on a multi-zone system
Energy Star status
ENERGY STAR certified[4]
AHRI certification number
215864254Non-Ducted Indoor Units[3]
Warranty
Standard: 5 yr parts / 7 yr compressor (standard registration/installation terms). 7-year compressor, 5-year parts warranty with standard registration/installation terms.
Install path
Professional install
Retail price
We could not find this exact model in stock at a retailer we work with when we last checked on 2026-07-28.
Available retailers
not published
Manual links
AHRI public detail 215864254, ENERGY STAR exact row 215864254, Cooper & Hunter MultiZone combination charts, Cooper & Hunter MultiZone combination charts, Cooper & Hunter Multi R installation manual, Cooper & Hunter Hyper Multi-Zone official product-page evidence for CH-R18MES-230VO, CH-R18MES-230VO Cooper & Hunter Hyper Multi-Zone non-ducted outdoor submittal, HVACDirect exact-offer audit for CH-R18MES-230VO
Specification sheet
not published
Last sourced date
Jul 28, 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.

  • Concealed ducteds

    12k, 18k

    Model numbers
    • 12k: CH-RS06-12MDT- MS
    • 12k: CH-RS06-12MDT-MS
    • 18k: CH-RS18MDT-MS

  • Four-way ceiling cassettes

    9k, 12k, 18k

    Model numbers
    • 9k: CH-RH09MCT
    • 12k: CH-RH12MCT
    • 12k: CH-RSH09-12MCT
    • 18k: CH-RH18MCT
    • 18k: CH-RSH18MCT

  • One-way ceiling cassettes

    12k, 18k

    Model numbers
    • 12k: CH-RSH06-12MCT1W
    • 18k: CH-RSH18MCT1W

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.

Parts and filters

Fits Cooper & Hunter Hyper Multi-Zone 3-Zone 18,000 BTU R-454B 208/230V (CH-R18MES-230VO). Part numbers and fit notes identify compatibility only; no manufacturer endorsement is implied.

compressor-service-identification

Compressor model KTN150D30UFZA

Fits
Cooper & Hunter Hyper Multi-Zone 3-Zone 18,000 BTU R-454B 208/230V (CH-R18MES-230VO)
Fit note
Fits CH-R18MES-230VO. Cooper & Hunter publishes the compressor model identifier in the submittal, but this is not an orderable OEM replacement part number; source by outdoor model and serial through Cooper & Hunter or Heat & Cool parts support.
Source
Cooper & Hunter CH-R18MES-230VO Submittal, Performance data, page p. 2 (Compressor Model KTN150D30UFZA)

outdoor-fan-motor

Outdoor fan motor

Fits
Cooper & Hunter Hyper Multi-Zone 3-Zone 18,000 BTU R-454B 208/230V (CH-R18MES-230VO)
Fit note
Fits CH-R18MES-230VO. The submittal documents fan-motor quantity and electrical data but no orderable motor part number; source by outdoor model and serial through Cooper & Hunter or Heat & Cool parts support.
Source
Cooper & Hunter CH-R18MES-230VO Submittal, Electrical data, page p. 2 (Outdoor fan motor Qty 1 Input w 80 RLA A 1)

line-set-port-sizes

Outdoor unit line-set port sizes

Fits
Cooper & Hunter Hyper Multi-Zone 3-Zone 18,000 BTU R-454B 208/230V (CH-R18MES-230VO)
Fit note
Fits CH-R18MES-230VO. The submittal publishes the outdoor port size set, not a packaged replacement part number. No offer is attached because Cooper & Hunter has no verified exact priced retailer offers in the local search outcome file.
Source
Cooper & Hunter CH-R18MES-230VO Submittal, Piping connections, page p. 2 (Liquid side/Gas side in 3x1/4"- 3x3/8")
Replacement Parts & Filters

Electrical requirements

Show
Voltage
230 V[2]
Voltage range
208/230V[2]
Phase
1[2]
Frequency
60 Hz[2]
MCA
16 A[2]
Breaker needed
not published
Maximum breaker size
20 A[2]
Maximum fuse size
20 A[2]
Maximum cooling current
not published
Maximum heating current
not published
Manufacturer wire notes
not published

Installation considerations

Show
Liquid line
3 x 1/4 in[2]
Suction line
3 x 3/8 in[2]
Line connection type
Flared line connections[2]
Precharged length
75 ft[2]
Included line-set length
Indoor heads are selected separately on a multi-zone system
Maximum line-set length
196.8 ft[2]
Max line set per indoor
98.4 ft[2]
Max height between indoor units
33 ft[2]
Indoor dimensions
Indoor heads are selected separately on a multi-zone system
Outdoor dimensions
35.04 x 13.46 x 26.50 in[2]
Indoor weight
Indoor heads are selected separately on a multi-zone system
Outdoor weight
100.53 lb[2]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the Cooper & Hunter Hyper Multi-Zone 3-Zone 18,000 BTU R-454B 208/230V (CH-R18MES-230VO) myself, or do I need a pro?
Cooper & Hunter Hyper Multi-Zone 3-Zone 18,000 BTU R-454B 208/230V (CH-R18MES-230VO) 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 Cooper & Hunter Hyper Multi-Zone 3-Zone 18,000 BTU R-454B 208/230V (CH-R18MES-230VO) keep heating in a cold winter?
The manufacturer publishes 13,500 BTU/h of heating output at 5F. Rated heating operation extends down to -13 F. Certified heating efficiency is 9.8 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 Cooper & Hunter Hyper Multi-Zone 3-Zone 18,000 BTU R-454B 208/230V (CH-R18MES-230VO) need?
Published electrical requirements: 230 V voltage, 16 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.
How far can the outdoor unit be from the indoor head?
The published maximum line-set length is 196.8 ft, and the included line set comes pre-charged for 75 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 Cooper & Hunter Hyper Multi-Zone 3-Zone 18,000 BTU R-454B 208/230V (CH-R18MES-230VO) carry?
The manufacturer publishes these warranty tiers: Standard: 5 yr parts / 7 yr compressor (standard registration/installation terms). Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.

Data sources

Show
  1. Cooper & Hunter: Cooper & Hunter Hyper Heat Multi-Zone official evidence for CH-RHP36M-230VOSourced - manufacturer product page

    Covers brand.dealer_installation_policy, electrical_spec.guaranteed_voltage_range, Max indoor units, product_line.name

  2. Cooper & Hunter: CH-R18MES-230VO Cooper & Hunter Hyper Multi-Zone non-ducted outdoor submittalSourced - manufacturer technical document

    Covers Frequency, Maximum breaker size, Maximum fuse size, Minimum circuit ampacity, Phase, Voltage and more

  3. Air-Conditioning, Heating, and Refrigeration Institute: AHRI public detail 215864254Sourced - AHRI directory

    Covers AHRI certification number, performance_spec.cold_climate_designation, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity and more

  4. U.S. Environmental Protection Agency ENERGY STAR: ENERGY STAR exact row check for AHRI 215864254Sourced - Energy Star listing

    Covers performance_spec.energy_star_cold_climate, Energy Star status

  5. Cooper & Hunter MultiZone combination chartsSourced - manual

    Covers Manual links

Last updated

Jul 28, 2026