COOPER & HUNTER — Slim-Duct (R454B)

Cooper&Hunter 3-Zone Ducted Mini Split AC & Heat Pump 48000 BTU (9K+18K+24K), Slim Duct Units, 230V

Bring flexible, concealed comfort to your space with the Cooper & Hunter Slim-Duct system. A 48000 BTU condenser powers slim-profile duct air handlers that disappear into ceilings, soffits, or chases for a clean, unobtrusive finish. This inverter heat pump provides independent control in 3 zone(s) and supports low-ambient heating performance down to -13 F.

Slim-Duct air handlers use TU1 copper tubing, medium / high static pressure blower performance, built-in Smart Kit connectivity, and R454B refrigerant (low-GWP) for efficient operation up to 24 SEER2. Equipped models include a refrigerant sensor to help maintain optimal operation.

Slim-Duct 3 Zone(s) 48000 BTU Outdoor SEER2 24 Heats to -13 F Outdoor SKU CH-R48MES-230VO Outdoor noise: 63 dB(A) Indoor noise (min): 32.5 dB(A) Built-in Smart Kit Medium/High static pressure

Contact for custom quotes Call 800-543-8933

Key features

Concealed comfort + ducted flexibility

Slim-profile duct unit hides in ceilings/soffits for a clean finish
Ideal for short duct runs to discreet registers/grilles
Designed for Single-Zone or Multi-Zone applications (model dependent)

Performance

3-zone independent temperature control
Medium static pressure models for standard duct layouts
High static pressure models for longer runs / higher resistance (size dependent)
High-efficiency operation up to 24 SEER2
Quiet operation (Outdoor as low as 63 dB(A); Indoor as low as 32.5 dB(A))
Reliable heating down to -13 F ambient

Built-in components

TU1 copper tubing for durability and heat transfer efficiency
Built-in Smart Kit with downloadable C&H app (where equipped)
Refrigerant sensor (where equipped) for system monitoring
Turbo mode for rapid conditioning
2025 model platform using R454B refrigerant (low-GWP)

Flexible installation

Choose between horizontal and vertical installation (model dependent)
Designed for tight spaces such as ceilings, soffits, or wall chases

Static pressure and install orientation vary by size (example: 24K can support high static pressure and flexible orientation). Confirm your model’s ESP range and dimensions in the indoor spec table below.

At-a-glance

Zones
3

Outdoor BTU
48000

SEER2
24

Low ambient
-13 F

Outdoor noise
63 dB(A)

Indoor noise (min)
32.5 dB(A)

Outdoor SKU
CH-R48MES-230VO

Control
Remote + Thermostat

Warranty requires licensed HVAC installation and registration within 60 days (if required).

Control options

Remote control included
Wall thermostat included
Wall thermostat should be connected on the unit for smart control functionality (where applicable).

Product video

What’s included

Cooper & Hunter Slim-Duct Mini Split System

Outdoor Unit: 48000 BTU (1 pc) — Model: CH-R48MES-230VO

Indoor Units (Slim-Duct):

- 6,000-12,000 BTU (x1) — Model: CH-RS06-12MDT- MS

- 18,000 BTU (x1) — Model: CH-RS18MDT-MS

- 24,000 BTU (x1) — Model: CH-RS24MDT-HS

Capacity Selection (Dip-Switch ENC1)

Set ENC1 from “0” to "1" → 6,000 BTU
Set ENC1 from “0” to "2" → 9,000 BTU
Set ENC1 from “0” to "3" → 12,000 BTU

Installation-Kit options (No Kit / 16 ft / 25 ft / 50 ft)
(INSTALLATION KIT SIZE MUST BE SELECTED, to be included)
Wireless Remote Controls (3 remotes)
Built-in Smart-Kit & C&H App control
Wall Thermostat
Installation & User Manuals
Manufacturer Warranty

6K–12K capacity selection (ENC1)

On supported 6K–12K Multiple Capacity Slim-Duct models, the ENC1 dip switch is used for capacity changes. When paired with single-zone condensers, the indoor unit can automatically adjust to match condenser capacity. When paired with multi-zone condensers, set ENC1 to select the desired indoor capacity.

ENC1 from “0” to “1” → 6,000 BTU/H
ENC1 from “0” to “2” → 9,000 BTU/H
ENC1 from “0” to “3” → 12,000 BTU/H

If this product does not include a 6K–12K indoor unit, ignore this section. Your spec table and

Capacity Selection (Dip-Switch ENC1)

Set ENC1 from “0” to "1" → 6,000 BTU
Set ENC1 from “0” to "2" → 9,000 BTU
Set ENC1 from “0” to "3" → 12,000 BTU

will reflect what applies.

Complete technical specifications — Indoor (Slim-Duct)

Indoor Unit Specifications — CH-RS06-12MDT- MS

Refrigerant type	R454B
System type	Single Zone
Filter dimensions (WxD) (inch)	23.3x7.24
BTU Rated	12,000
Power source	208-230V, 1Ph, 60Hz
Dehumidification value (pnt/day)	2.66
Voltage range (V)	187-253
Packing dimensions (WxDxH)	33.86 x 21.26 x 11.22
Controller	wire controller + remote controller available
Refrigerant piping Liquid/Gas side (inch)	1/4"/3/8"
EER2	12
SEER2	20
Unit Net/Gross weight	39.46/46.74
Unit dimensions (WHD)	27.56 x 19.92 x 7.87
Operation Range - Heating	32~86
Operation Range - Cooling	60~90
Minimum circuit ampacity	3
Max.fuse	15
Indoor Noise Level H/M/L	36/34.5/32.5
Indoor Air Flow	400.2 / 323.7 / 264.9 / 176.6
ESP Range	0-0.4
Drainage water pipe diameter	1"

Indoor Unit Specifications — CH-RS18MDT-MS

Refrigerant type	R454B
System type	Single Zone
Filter dimensions (WxD) (inch)	30.2x7.47
BTU Rated	18,000
Power source	208-230V, 1Ph, 60Hz
Dehumidification value (pnt/day)	3.53
Voltage range (V)	187-253
Packing dimensions (WxDxH)	42.13 x 28.54 x 11.02
Controller	wire controller + remote controller available
Refrigerant piping Liquid/Gas side (inch)	1/4"/1/2"
EER2	12
SEER2	18
Unit Net/Gross weight	54.45/66.14
Unit dimensions (WHD)	34.65 x 26.54 x 8.27
Operation Range - Heating	32~86
Operation Range - Cooling	60~90
Minimum circuit ampacity	3
Max.fuse	15
Indoor Noise Level H/M/L	40/39/38
Indoor Air Flow	600.4 / 559.2 / 500.3 / 441.4
ESP Range	0-0.4
Drainage water pipe diameter	1"

Indoor Unit Specifications — CH-RS24MDT-HS

Refrigerant type	R454B
System type	Single Zone
Filter dimensions (WxD) (inch)	17.28x7.95
BTU Rated	24,000
Power source	208-230V, 1Ph, 60Hz
Dehumidification value (pnt/day)	4.29
Voltage range (V)	187-253
Packing dimensions (WxDxH)	42.13 x 28.54 x 11.02
Controller	wire controller + remote controller available
Refrigerant piping Liquid/Gas side (inch)	3/8"/5/8"
EER2	12
SEER2	19
Unit Net/Gross weight	54.45/66.14
Unit dimensions (WHD)	34.65 x 26.54 x 8.27
Operation Range - Heating	32~86
Operation Range - Cooling	60~90
Minimum circuit ampacity	3
Max.fuse	15
Indoor Noise Level H/M/L	40/37/35
Indoor Air Flow	853.5 / 706.3 / 618 / 500.3
ESP Range	0-0.8
Drainage water pipe diameter	1"

Manuals

Submittals

Complete technical specifications — Outdoor

Outdoor Unit Specifications — CH-R48MES-230VO

Refrigerant type	R454B
System type	Multi-zone unit
Power source	208-230V, 1Ph, 60Hz
Dehumidification value (pnt/day)	6.98
Voltage range (V)	187-253
Packing dimensions (WxDxH)	43.11 x 19.49 x 58.27
Refrigerant piping Liquid/Gas side (inch)	6x1/4" - 4x3/8"+2x1/2"
HSPF2-5	8
HSPF2-4	10.3
EER2	12.5
Cooling capacity (Min/Max) (BTU/h)	47,000(12,000~55,000)
SEER2	24
Unit Net/Gross weight	222.00/254.19
Unit dimensions (WHD)	37.48 x 16.34 x 52.48
Refrigerant precharge	150
Outdoor Noise Level	63
Outdoor Air Flow	4,502.8
Minimum circuit ampacity	34
Max.fuse	40
Max height difference between Indoor and Outdoor unit	49.2
Heating capacity (Min/Max) (Btu/h)	48,000(13,000~53,000)
COP	3.8
Ambient temperature - Heating (F)	-13~75
Ambient temperature - Cooling (F)	-13~122
Additional Refrigerant Charge 3/8 liquid line	0.32
Additional Refrigerant Charge 1/4 liquid line	0.16

Manuals

https://media.cooperandhunter.us/4442/Installation-manual-Multi-R.pdf

Submittals

Documents

Warranty information

7-Year Compressor Warranty
5-Year Parts Warranty
1-Year Remote Control Warranty

Note: Warranty valid only when installed by a licensed HVAC technician and registered within 60 days of installation.

Summary

Expand

This Cooper & Hunter Slim-Duct system uses a 48000 BTU outdoor condenser with CH-R48MES-230VO + CH-RS06-12MDT- MS + CH-RS18MDT-MS + CH-RS24MDT-HS slim-profile duct air handler(s) for concealed, flexible comfort. Medium/high static pressure capability supports ducted distribution, and low-ambient heating supports operation down to -13 F. Smart control and monitoring features vary by model and are reflected in the included components and specification tables.