Cooper & Hunter / Slim Duct
Cooper Hunter Slim Duct 36k Hyper Concealed Ducted R-454B 208/230V Mini-Split
The hyper light-commercial slim-duct head delivers 36,000 BTU cooling and a substantial 42,000 BTU of heating at 17.7 SEER2 and 11.1 HSPF2, rated to -22F.
That 42,000 BTU heating figure is the highest heat output relative to cooling anywhere in this batch, and it holds to -22F. For a building that has to stay warm in a hard winter without any visible equipment, there are few alternatives at this size.
1 zoneProfessional installCurrent
Refrigerant generation
R-454B - current-generation refrigerant
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Data completeness: 92%
- Last sourced
- Aug 2, 2026
SplitAtlas score
8.3 / 10
Cooling efficiencyBottom quartile
(17.7 SEER2) among 36k systems
Heating efficiencyTop 10%
(11.1 HSPF2) among 36k systems
Cold-weather performanceAbove average
(89.5% heat retained at 5F; -22 F heating floor) among 36k systems
WarrantyBelow average
(5 yr parts / 7 yr compressor) across the catalogue
Feature setAbove average
(6 verified features) across the catalogue
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
- 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.
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Key ratings
Buyer review snapshot
Best for / skip if
Skip if
- Top-efficiency cooling is the priority; SEER2 is 17.7.
Install difficulty
Professional flared-line install
- Electrical: 230V; MCA 38 A; breaker/fuse 40 A.
- Line set: Flared line connections; precharged 25 ft; max 246 ft.
Availability and price context
We could not verify a current retail price for this model. We do not currently have a verified in-stock offer from a retailer we work with when we last checked on 2026-08-02.
Source date
- Model data sourced
- Aug 2, 2026
- Page reviewed
- Aug 2, 2026
- Source-backed records
- 3
- Newest source retrieved
- Aug 2, 2026
Warranty tiers
Warranty: 5 years parts and 7 years compressor as standard.
Model context
- Structured ratings
- Certification: ENERGY STAR certified and AHRI cold-climate designated. Refrigerant: current low-GWP R-454B. Minimum heating ambient: -22 F.
Strengths
- 42,000 BTU of heating - the strongest heating-to-cooling ratio in this batch.
- 11.1 HSPF2 with a -22F rating at light-commercial scale.
- Entirely concealed installation.
Weaknesses
- 17.7 SEER2 - ducting three tons costs real cooling efficiency.
- A low-static head at 36,000 BTU demands professionally designed ductwork.
- Concealed access makes filter and coil servicing easy to skip.
Climate suitability
- Minimum heating ambient
- -22 F[1]
- Rated heating at 5F
- 37,600 BTU/h[2]
- Rated heating at 17F
- 31,600 BTU/h[2]
- Rated heating at 47F
- 42,000 BTU/h[2]
Specifications
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- Manufacturer
- Cooper & Hunter
- Brand
- Cooper & Hunter
- Product line
- Slim Duct
- Model number
- CH-RS36LCDT-HS indoor / CH-RHP36LCU-230VO outdoor
- Indoor unit model
- CH-RS36LCDT-HS
- Outdoor unit model
- CH-RHP36LCU-230VO
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 36,000 BTU/h[2]
- Rated heating capacity
- 42,000 BTU/h[2]
- Voltage
- 230 V[1]
- MCA
- 38 A[1]
- Maximum fuse or breaker size
- 40 A[1]
- Breaker needed
- not published
- SEER2
- 17.7 SEER2[2]
- EER2
- 12 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
- 2.1 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
- 64.5 dBA[1]
- Indoor weight
- not published
- Outdoor weight
- 206.57 lb[1]
- Refrigerant
- R-454B[2]
- Refrigerant charge
- not published
- Manufacturer coverage
- not published
- Line-set size
- 3/8 in liquid / 3/4 in suction
- Included line-set length
- C&H cassette and slim-duct systems are professional-install equipment; the installer supplies the refrigerant line set within published piping limits.
- Maximum line-set length
- 246 ft[1]
- Max line set per indoor
- not published
- Maximum elevation difference
- 98.4 ft[1]
- Max height between indoor units
- not published
- Wi-Fi support
- supported[1]
- Energy Star status
- ENERGY STAR certified[2]
- AHRI certification number
- 215864220[2]
- Warranty
- Standard: 5 yr parts / 7 yr compressor (licensed-technician installation and registration terms). 7-year compressor and 5-year parts limited warranty with licensed-technician installation and registration terms.
- Install path
- Professional install
- Retail price
- We do not currently have a verified in-stock offer from a retailer we work with when we last checked on 2026-08-02.
- Available retailers
- not published
- Manual links
- AHRI Active public directory row 215864220, Installation Manual - Medium/High Static Duct, Cooper & Hunter Multi R installation manual, Cooper & Hunter Slim Duct official product pages for CH-RS36LCDT-HS, Owner's Manual - Medium/High Static Duct, Cooper & Hunter support-material submittal for CH-RHP36LCU-230VO + CH-RS36LCDT-HS
- Specification sheet
- Cooper & Hunter support-material submittal for CH-RHP36LCU-230VO + CH-RS36LCDT-HS
- Last sourced date
- Aug 2, 2026
Electrical requirements
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- Voltage
- 230 V[1]
- Voltage range
- 208/230V[1]
- Phase
- 1[1]
- Frequency
- 60 Hz[1]
- MCA
- 38 A[1]
- Breaker needed
- not published
- Maximum breaker size
- 40 A[1]
- Maximum fuse size
- 40 A[1]
- Maximum cooling current
- not published
- Maximum heating current
- not published
- Manufacturer wire notes
- Field wiring per C&H support-material submittal and local electrical code.[1]
Installation considerations
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- Liquid line
- 3/8 in[1]
- Suction line
- 3/4 in[1]
- Line connection type
- Flared line connections[1]
- Precharged length
- 25 ft[1]
- Included line-set length
- C&H cassette and slim-duct systems are professional-install equipment; the installer supplies the refrigerant line set within published piping limits.
- Maximum line-set length
- 246 ft[1]
- Max line set per indoor
- not published
- Max height between indoor units
- not published
- Indoor dimensions
- not published
- Outdoor dimensions
- 38.58 x 16.34 x 38.39 in[1]
- Indoor weight
- not published
- Outdoor weight
- 206.57 lb[1]
- Drain size
- not published
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- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Cooper & Hunter Slim Duct 36,000 BTU R-454B 208/230V (CH-RS36LCDT-HS / CH-RHP36LCU-230VO) myself, or do I need a pro?
- Cooper & Hunter Slim Duct 36,000 BTU R-454B 208/230V (CH-RS36LCDT-HS / CH-RHP36LCU-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 Slim Duct 36,000 BTU R-454B 208/230V (CH-RS36LCDT-HS / CH-RHP36LCU-230VO) keep heating in a cold winter?
- The manufacturer publishes 37,600 BTU/h of heating output at 5F. Rated heating operation extends down to -22 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 Cooper & Hunter Slim Duct 36,000 BTU R-454B 208/230V (CH-RS36LCDT-HS / CH-RHP36LCU-230VO) need?
- Published electrical requirements: 230 V voltage, 38 A minimum circuit ampacity, and 40 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 246 ft, and the included line set comes pre-charged for 25 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 Slim Duct 36,000 BTU R-454B 208/230V (CH-RS36LCDT-HS / CH-RHP36LCU-230VO) carry?
- The manufacturer publishes these warranty tiers: Standard: 5 yr parts / 7 yr compressor (licensed-technician installation and registration terms). Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.
Data sources
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- Cooper & Hunter: Cooper & Hunter support-material submittal for CH-R36LCU-230VO + CH-RS36LCDT-HSSourced - manufacturer technical document
Covers Frequency, electrical_spec.guaranteed_voltage_range, Maximum breaker size, Maximum fuse size, Minimum circuit ampacity, Phase and more
- Air-Conditioning, Heating, and Refrigeration Institute: AHRI Active Cooper & Hunter form-factor row 215864231Sourced - AHRI directory
Covers AHRI certification number, performance_spec.cold_climate_designation, Rated cooling capacity, COP at 5F, EER2, Energy Star status and more
- Cooper & Hunter: Cooper & Hunter Multi R installation manual limited warranty sectionSourced - manufacturer technical document
Covers Legacy compressor warranty value, Legacy warranty value, Standard compressor warranty, Standard warranty conditions, Standard parts warranty, Warranty notes
Last updated
Aug 2, 2026