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Just installed our Cooper & Hunter split. It's perfect! I purchased the accessories that were suggested and that was everything we needed. It's unbelievably quiet. It arrived quickly.I unconditionally recommend Mini Split Warehouse.
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New R454B C&H Central Ducted Hyper Heat Pump AC System Included in Package: (1) One Indoor Air Handler (Thermostat Included) (1) One Hyper Heat Pump Outdoor Unit ( -13F /-13 F ) Factory Warranty : 7 Yr Compressor /5 Yr Parts Copper & Indoor to Outdoor Wire can be added via the dropdown boxes above Wire option above is communication from indoor to outdoor, you will need field supplied wires also. See Related Items Below For More Accessories INDOOR KEY FEATURES Installation Flexibility A built-in sec...
Cooper & Hunter's 18,000 BTU Central AHU delivers inverter-driven heat pump performance through your existing ductwork — achieving 18.5 SEER2, 12.1 EER2, and 9.8 HSPF2 with next-gen R454B refrigerant. Energy Star certified, with a -13°F minimum heating temperature that makes it a viable primary heat source in most U.S. climates.
Multi-position installation (horizontal or vertical), built-in anti-cold air protection, TU1 copper tubes, and a wired Wi-Fi thermostat are standard. Optional electric heat strips (5kW–20kW) can be added as a backup. If your home has existing central ductwork, this unit is the most cost-effective way to upgrade the entire system to inverter-driven heat pump efficiency.
| Technical Specifications | |
|---|---|
| Model (Indoor / Outdoor) | CH-RS18MAHU / CH-RES18-230VO |
| System Type | Single-Zone Central AHU Heat Pump |
| Cooling Capacity | 18,000 BTU/h (1.5 Ton) |
| Cooling Efficiency | 18.5 SEER2 |
| EER2 | 12.1 |
| Heating Efficiency | 9.8 HSPF2 |
| Min. Heating Temperature | -13°F / -25°C |
| Refrigerant | R454B (A2L Low-GWP) |
| Voltage | 208/230V / 60Hz / 1Ph |
| Installation Positions | Horizontal, Vertical Upward, Vertical Downward |
| Wired Thermostat | Included (Wi-Fi capable) |
| Auxiliary Heater | Compatible — 5kW, 10kW, 15kW, 20kW (sold separately) |
| Energy Star | Yes — Certified |
| Warranty | 7-Year Compressor / 5-Year Parts |
Replaces your existing 1.5-ton air handler and connects directly to existing supply/return ductwork — no new ducts, no demo.
Horizontal, vertical upward, or vertical downward. Built-in secondary drain pan for added moisture protection in all positions.
Fan stays off until the heating coil warms up, preventing cold drafts at system start — unlike traditional heat pumps.
At 9.8 HSPF2, the 18K model delivers slightly better heating efficiency than the 24K. Right-sizing matters for both comfort and cost.
Accepts optional electric heat strips (5kW–20kW, sold separately) for emergency backup heat in extreme cold events.
High-purity copper (99.97%+) for superior heat transfer efficiency, corrosion resistance, and long service life.
No weight limits. No dimensional charges. Free freight delivery on every order.
Every unit ships with the full manufacturer warranty — no third-party coverage needed.
We cut out the middleman. Compare us against any competitor — we back our pricing.
Shop Pioneer, Daikin, Midea, MRCOOL, Cooper & Hunter, and more in one place.
Call or email our team. We answer specs, sizing, and installation questions — not scripts.
Pay by check or bank transfer and get 3% back — one of the easiest savings available.

The 18K BTU (1.5-ton) AHU is typically suited for homes around 700–1,100 sq ft depending on insulation, ceiling height, and climate. If you're replacing an existing 1.5-ton system, this is a direct match. Our team can help confirm sizing — call or email before you order.
Same construction, same features, different capacity. The 18K version actually achieves slightly higher HSPF2 (9.8 vs 9.0) due to right-sizing effects. Choose based on your existing duct system size and manual J load calculation.
Yes. The AHU is designed for optional heat strips (5kW, 10kW, 15kW, 20kW) that mount inside the unit. Sold separately. Useful for providing backup resistance heat on very cold days below the -13°F operating floor.
The unit ships with a wired 120N thermostat with Wi-Fi for C&H app control. It also accepts most standard 24V wired thermostats (Honeywell, Ecobee, etc.) — connect to the R, C, Y, G, W terminals as normal.
Yes for refrigerant line connection — EPA Section 608 certification is required to handle R454B. The duct connection and electrical can be handled by a skilled HVAC tech or licensed contractor. We have a vetted installer network and can provide referrals.
| Title | C&H 18K-Btu 18.5 SEER2 Central-AHU Mini Split Heat Pump (-13Β°F) E-Star: 12.1 EER/9.8 HSPF (R454B) |
|---|---|
| Brand | Cooper and Hunter |
| Category | 18000 Btu | 1.5 Ton | 600-800 Sq Ft |
| SKU | CH-RS18MAHU/CH-RES18-230VO |
| Condition | new |
| UPC | 810035931107 |
| MPN | CH-RS18MAHU |
Just installed our Cooper & Hunter split. It's perfect! I purchased the accessories that were suggested and that was everything we needed. It's unbelievably quiet. It arrived quickly.I unconditionally recommend Mini Split Warehouse.
I replaced 10 central units in my rentals with these, all the tenants are reporting 30-50% lower energy bills!!
Everything included, easy setup, quality product! Finally my 3 seasons room is useable. I would buy this product again
Just installed our Cooper & Hunter split. It's perfect! I purchased the accessories that were suggested and that was everything we needed. It's unbelievably quiet. It arrived quickly.I unconditionally recommend Mini Split Warehouse.
Dena · 2024-10-11I replaced 10 central units in my rentals with these, all the tenants are reporting 30-50% lower energy bills!!
Garrett Walsh · 2024-08-14Everything included, easy setup, quality product! Finally my 3 seasons room is useable. I would buy this product again
Garner · 2024-11-12