Medium Static Slim Duct • 18,000 BTU • R454B • 230V
Cooper&Hunter 18K Slim Duct — CH-RS18MDT-MS
Concealed ducted comfort for tight ceilings and soffits with medium-static performance and Smart Kit app control.
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Overview
The Cooper&Hunter CH-RS18MDT-MS is a medium static slim duct indoor unit built for clean, concealed installations where wall-mounted heads aren’t ideal. Using R454B refrigerant, it supports single-zone systems and can be used in multi-zone applications when paired with compatible outdoor equipment. With medium static pressure capability (ESP 0–0.4), it maintains consistent airflow through duct runs and registers. A built-in Smart Kit enables app control, while the refrigerant sensor helps support stable operation. Built with TU1 copper tubes for durability and heat transfer, this unit is a strong choice for compact ducted comfort in bedrooms, offices, and finished basements.
Highlights
18,000 BTU SEER2 18.0 EER2 12.0 R454B Medium Static (ESP 0–0.4) Built-in Smart Kit (App) Refrigerant Sensor Slim Duct Form Factor TU1 Copper Tubes
- Slim concealed install: designed for tight spaces in ceilings, bulkheads, or wall cavities.
- Medium static performance: supports duct runs and grilles with consistent airflow (ESP 0–0.4).
- Connected control: built-in Smart Kit for app control and system management.
- Durable build: TU1 copper tubing for dependable heat transfer and longevity.
- Flexible systems: single-zone unit that can be used in multi-zone configurations with a matching outdoor unit.
ModelCH-RS18MDT-MS
Voltage208–230V, 1Ph
Line Set1/4" (liq) / 1/2" (gas)
ESP0–0.4
What's Included
- Indoor slim duct unit: CH-RS18MDT-MS
- Built-in Smart Kit (C&H app control)
- Refrigerant sensor
- Support for wire controller + remote controller (as configured)
Indoor Specs
| Spec | Details |
|---|---|
| Model | CH-RS18MDT-MS |
| Refrigerant Type | R454B |
| System Type | Single Zone (multi-zone compatible with matching outdoor) |
| BTU Rated | 18,000 |
| SEER2 / EER2 | 18.0 / 12.0 |
| Power Source | 208–230V, 1Ph, 60Hz |
| Voltage Range | 187–253 V |
| Minimum Circuit Ampacity | 3 A |
| Max Fuse | 15 A |
| Refrigerant Piping (Liquid / Gas) | 1/4" / 1/2" |
| Dehumidification | 3.53 pints/day |
| Indoor Noise (H/M/L) | 40 / 39 / 38 dB(A) |
| Indoor Air Flow | 600.4 / 559.2 / 500.3 / 441.4 CFM |
| External Static Pressure (ESP) | 0–0.4 |
| Unit Dimensions (W×H×D) | 34.65 × 26.54 × 8.27 in |
| Unit Net / Gross Weight | 54.45 / 66.14 lb |
| Packing Dimensions (W×D×H) | 42.13 × 28.54 × 11.02 in |
| Filter Dimensions (W×D) | 30.2 × 7.47 in |
| Drain Pipe Diameter | 1" |
| Operation Range (Cooling) | 60–90 °F |
| Operation Range (Heating) | 32–86 °F |
Documents & Downloads
Important
Professional installation is recommended. This is an indoor unit intended to be paired with a compatible outdoor system. Confirm duct design/static pressure needs (ESP 0–0.4), electrical requirements (208–230V), line sizes (1/4" liquid, 1/2" gas), condensate routing (1" drain), and return/filter access before installation.
FAQs
Is this unit suitable for tight ceiling installs?
Yes. It’s a slim duct format designed for concealed installations in compact spaces.
Does it support app control?
Yes. It includes a built-in Smart Kit for control via the C&H app.
What line sizes are required?
1/4" liquid and 1/2" gas.
Is it single-zone or multi-zone?
The indoor unit is listed as single-zone, and it can be used in multi-zone configurations when paired with a compatible outdoor unit.
What does “medium static” mean here?
It supports duct runs with external static pressure up to 0.4, helping maintain airflow through grilles and registers.
