Cooper & Hunter 2 Zone 28,000 BTU Olivia Midnight Ductless Mini Split AC Wall Mounted 12K+18K - CH-R28MES-230VO/M12WMB+M18WMB-NO/NO-MN
The Cooper & Hunter Olivia 2-Zone Mini Split System features a 28,000 BTU outdoor unit with a minimum heating ambient of -13°F, paired with two wall-mount zones rated at 12,000 BTU and 18,000 BTU, both using the Olivia Midnight design. It includes built-in Wi-Fi control, operates with R454B refrigerant, and achieves a SEER2 rating of 25.
Features
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2-zone system — the CH-R28MES-230VO outdoor unit supports up to 4 indoor units, each individually controlled; port adapters included, no branch boxes required
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27,000 Btu/h rated cooling / 27,000 Btu/h rated heating — inverter range 7,200–32,000 cooling, 8,400–29,000 heating (Btu/h)
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25 SEER2 / 13 EER2 / 9.5 HSPF4 — current R454B-generation efficiency
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Heats down to -13°F outdoor ambient — 19,000 Btu/h rated heating at 5°F; cooling operation -13–122°F
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Wi-Fi Smart Kit built in — Cooper & Hunter app control; remote control included with each indoor unit; compatible with C&H 12V wall thermostat (sold separately)
- ETL listed, AHRI certified, Energy Star Cold Climate & NEEP listed
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Outdoor unit (condenser): CH-R28MES-230VO — 28,000 BTU multi-zone R454B outdoor unit, pre-charged for up to 100 ft of line
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Zone 1 — Wall Mount (Olivia Midnight): CH-RB12MOLVWM-230VI (12,000 Btu/h) with remote control
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Zone 2 — Wall Mount (Olivia Midnight): CH-RB18MOLVWM-230VI (18,000 Btu/h) with remote control
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Wi-Fi Smart Kit (built in) for app control
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Installation kits — choose 16 ft, 25 ft, or 50 ft per zone: copper line set, communication cable, and drain line
Specifications
| Power Supply |
208/230V, 1 Ph, 60 Hz (voltage range 187-253V) |
| Cooling — Rated Capacity (Range) |
60,000 Btu/h (19,000–62,000) |
| Heating at 47°F — Rated Capacity (Range) |
60,000 Btu/h (20,000–60,000) |
| Rated Heating at 5°F |
39,000 Btu/h |
| SEER2 / EER2 |
22 / 10 |
| HSPF4 / HSPF5 / COP (47°F) |
9.5 / 7.4 / 3.7 |
| Outdoor Unit MCA / Max. Fuse |
36 A / 40 A |
| Max. Connectable Indoor Units |
6 |
| Outdoor Noise Level |
65 dB(A) |
| Outdoor Unit Dimensions (W×D×H) |
37.48 × 16.34 × 52.48 in |
| Outdoor Unit Net / Gross Weight |
237.88 / 270.28 lbs |
| Refrigerant Type / Charge |
R454B / 151.68 oz |
| Pre-charged Line Length |
150 ft (add 0.16 oz/ft for 1/4 in liquid pipe / 0.32 oz/ft for 3/8 in liquid pipe) |
| Max. Total Pipe Length / Max. to One Indoor |
262.4 ft / 114.8 ft |
| Max. Height Difference (Indoor–Outdoor / Between Indoors) |
49.2 ft / 33 ft |
| Operating Range — Cooling / Heating |
-13–122°F / -13–75°F outdoor ambient |
What our Experts Think
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Stylish two-zone comfort: The Cooper & Hunter Olivia Midnight 28,000 BTU Mini Split system combines powerful performance with a sleek black wall-mounted design for modern spaces.
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Flexible zone control: The 12K + 18K BTU configuration allows independent temperature settings in different rooms, improving comfort and efficiency.
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Efficient inverter technology: Variable-speed operation helps maintain consistent temperatures while reducing energy consumption compared to traditional HVAC systems.
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Eco-friendly R454B refrigerant: Uses next-generation R454B refrigerant designed for improved environmental performance with lower global warming potential.
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Powerful heating and cooling: Heat pump technology provides reliable year-round comfort with efficient cooling in summer and heating in colder months.
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Quiet, modern operation: Olivia Midnight indoor units are designed for comfortable airflow, low-noise performance, and a premium appearance.
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Ideal for ductless installations: A great solution for homes, additions, renovations, and spaces where traditional ductwork is unavailable or impractical.
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Expert recommendation: A smart choice for homeowners seeking efficient two-room climate control, modern aesthetics, and dependable all-season performance.
Q&A
Q: What is the cooling capacity of the Cooper & Hunter Olivia Midnight 2-Zone Mini Split System?
A: This system delivers 28,000 BTU of cooling capacity for efficient multi-room heating and cooling comfort.
Q: How many zones does this mini split system support?
A: It supports 2 independent zones, allowing separate temperature control for two different rooms or areas.
Q: What indoor units are included in this package?
A: This configuration includes two wall-mounted indoor units rated 12,000 BTU and 18,000 BTU (12K+18K) for flexible zone comfort.
Q: Does this system provide both heating and cooling?
A: Yes, it is a ductless inverter heat pump system designed for year-round air conditioning and heating.
Q: What refrigerant does this Cooper & Hunter mini split use?
A: It uses R454B refrigerant, a lower-GWP refrigerant designed for modern HVAC efficiency and environmental performance.
Q: What voltage is required for installation?
A: This system operates on 208-230V, single-phase, 60Hz electrical power.
Q: Is this a ductless wall-mounted mini split system?
A: Yes, the wall-mounted ductless design provides efficient heating and cooling without traditional ductwork.
Q: Can each zone be controlled separately?
A: Yes, the dual-zone setup allows independent temperature settings for personalized comfort in each space.
Maintenance Tips
Damage 
Loss 
Theft 
