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

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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

(5F certified capacity: 71.1% of the 47F rating; -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

This system needs a professional install, so its real price is an installed quote that depends on your home. We don't link to a listing for this exact model; get installation quotes to price it.

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

Registered
5 yr parts / 7 yr compressor - standard registration/installation terms

The score uses Registered. Additional published terms are shown for reference and not counted in the score.

Review methodology

Model context

Install path
This is professional-install equipment; price it with an installed quote.
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]
Certified 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
Depends on the indoor units you choose
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)
Varies by indoor-unit combination
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
Depends on the indoor units you choose
Outdoor noise rating
59.5 dBA[2]
Indoor weight
Depends on the indoor units you choose
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
Depends on the indoor units you choose
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
Depends on the indoor units you choose
Energy Star status
ENERGY STAR certified[4]
AHRI certification number
215864254Non-Ducted Indoor Units[3]
Warranty
Registered: 5 yr parts / 7 yr compressor (standard registration/installation terms). Score uses Registered.. 7-year compressor, 5-year parts warranty with standard registration/installation terms.
Install path
Professional install
Retail price
Installed quote only
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
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
Depends on the indoor units you choose
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
Depends on the indoor units you choose
Outdoor dimensions
35.04 x 13.46 x 26.50 in[2]
Indoor weight
Depends on the indoor units you choose
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 AHRI/ENERGY STAR certification lists 13,500 BTU/h of heating capacity 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 from the outdoor unit to one indoor head is 98.4 ft. The combined piping limit across all heads is 196.8 ft. The outdoor unit's factory charge covers up to 75 ft of line; longer runs need added refrigerant. 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: Registered: 5 yr parts / 7 yr compressor (standard registration/installation terms). Score uses Registered.. 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