Multi-Position Air Handler • 18,000 BTU • R454B • 230V
Cooper&Hunter 18K Multi-Position Air Handler — CH-RS18MAHU
Flexible horizontal/vertical installation with intelligent airflow control, Smart Kit app connectivity, and optional auxiliary heat.
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Overview
The Cooper&Hunter CH-RS18MAHU is an 18,000 BTU multi-position air handler designed for horizontal or vertical installation in ducted applications. Using R454B refrigerant, it’s listed as a single-zone indoor unit and can be applied in multi-zone systems when paired with compatible outdoor equipment. With ESP 0–0.8 and a multi-speed fan, it supports a wide range of duct layouts and airflow requirements. This model is built with TU1 copper tubes and an aluminum coil for durable heat transfer performance, and it supports multiple control approaches (wired controller and remote options). For backup heat in colder conditions or emergency scenarios, an optional auxiliary heater can be added (sold separately).
Highlights
18,000 BTU SEER2 18.0 EER2 12.0 R454B Multi-Position (H/V) ESP 0–0.8 Built-in Smart Kit (App) Anti-Cold Air Refrigerant Leak Detection TU1 Copper Tubes
- True multi-position install: supports horizontal or vertical orientation to match space constraints.
- Intelligent airflow: multi-speed fan motor supports static/airflow tuning for duct performance.
- Comfort-first startup: Anti-Cold Air behavior helps reduce cold drafts in heating mode.
- Fast response: rapid cool/heat behavior for quicker setpoint recovery.
- Optional backup heat: add an auxiliary heater kit as a supplemental heating option (sold separately).
ModelCH-RS18MAHU
Voltage208–230V, 1Ph
Line Set1/4" (liq) / 1/2" (gas)
ESP0–0.8
What's Included
- Indoor multi-position air handler: CH-RS18MAHU
- Built-in Smart Kit (C&H app control)
- Support for wired controller + remote controller (as configured)
- Field-supplied filter (unit supports 16" × 20" filter sizing)
Indoor Specs
| Spec | Details |
|---|---|
| Model | CH-RS18MAHU |
| 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 | 3.5 A |
| Max Fuse | 15 A |
| Refrigerant Piping (Liquid / Gas) | 1/4" / 1/2" |
| Dehumidification | 3.57 pints/day |
| Indoor Noise (H/M/L) | 42.5 / 37.5 / 30 dB(A) |
| Indoor Air Flow | 618.0 / 576.8 / 529.7 / 488.5 CFM |
| External Static Pressure (ESP) | 0–0.8 |
| Unit Dimensions (W×H×D) | 17.52 × 21.02 × 45 in |
| Unit Net / Gross Weight | 104.72 / 125.66 lb |
| Packing Dimensions (W×D×H) | 20.87 × 26.57 × 48.62 in |
| Filter | Field supply (unit supports 16" × 20" filter sizing) |
| Drain Pipe Diameter | 3/4" |
| Operation Range (Cooling) | 60–90 °F |
| Operation Range (Heating) | 32–86 °F |
Documents & Downloads
Important
Professional installation is recommended. This is an indoor air handler intended to be paired with a compatible outdoor system. Confirm duct design/static pressure needs (ESP 0–0.8), electrical requirements (208–230V), line sizes (1/4" liquid, 1/2" gas), condensate routing (3/4" drain), and filter/return access (field-supplied filter) before installation. Optional auxiliary heater kits are sold separately and must be matched to the air handler configuration.
FAQs
Can this air handler be installed horizontally or vertically?
Yes. It’s designed as a multi-position air handler for horizontal or vertical installations. Confirm clearances, drain routing, and service access for your chosen orientation.
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 a filter included?
The filter is field-supplied. The unit supports a 16" × 20" filter sizing.
Can I add backup electric heat?
Yes. An optional auxiliary heater can be added as backup heat (sold separately). Match the heater kit to the AHU and installation requirements.
