The MRCOOL® Olympus MULTI3-18HP230C-O is a high-performance 18,000 BTU multi-zone heat pump condenser designed to power up to three indoor units simultaneously. Perfect for homeowners looking to efficiently manage temperatures in multiple spaces, this ductless system offers individualized climate control for each connected zone, making it a flexible solution for modern living environments. Built with advanced inverter technology, the unit delivers impressive efficiency, with SEER2 ratings up to 25.1 and HSPF2-4 up to 10. It performs reliably in diverse conditions, operating in outdoor temperatures as low as 5°F, ensuring comfort in both summer and winter months. This model is compatible with various
MRCOOL indoor units, including wall-mounted, ceiling cassette, and concealed duct options, giving users the freedom to tailor the system to their home’s layout and aesthetics. Smart features elevate user convenience, with control options that include the MRCOOL SmartHVAC app, traditional remotes, or even voice commands via Amazon Alexa and Google Assistant. Additional functions such as sleep mode, auto restart, and refrigerant leak detection contribute to enhanced safety and comfort. Backed by a 7-year warranty on the compressor and 5 years on parts (with professional installation), the MRCOOL®Olympus MULTI3-18HP230C-O is a reliable and energy-efficient choice for those seeking customized, zone-specific heating and cooling.
| Net Dimensions (In) | 13.46 D x 26.5 H x 35.04 W |
| Net Weight (Lbs) | 100.53 |
| SEER2 | Up to 25.1 |
| EER2 | Up to 14 |
| HSPF2-4 | 9.8 |
| HSPF2-5 | 7.8 |
| Tonnage | 1.5 |
| Cooling Capacity (Btu) | 18000 |
| Heating Capacity (Btu) | 19000 |
| Voltage (V) | 208/230 |
| Phase | 1 |
| Cycle | 60 |
| Max Fuse Breaker (A) | 20 |
| Min Circuit Ampacity (A) | 16 |
| Color | White |
| Max Coverage Area | Up to 750 |
| Zone Capacity | 3 |
| Refrigerant Type | R-454B |
| Refrigerant Volume (Oz) | 61.73 |
| Decibel Rating (Dba) | 59.5 |
| Inverter | DC |
| Max Lineset Length (Ft) | 196.8 total |
| Lineset Fitting Type | Flare |
| Liquid Line Size | 3 x 1/4 |
| Suction Line Size | 3 x 3/8 |
| Compressor Motor Type | Twin-Rotary |
| Condenser Fan Motor Rpm | 750/600/500 |
| Metering Device | EXV + Capillary |
| UL Listed | Yes |
| CSA Listed | Yes |
| ETL Listed | Yes |
| Energy Star Certified | Yes |
| AHRI Certified | Yes |
| Base Warranty | 5-Year Parts/7-Year Compressor |
| Base Parts Warranty | 5-Year |
| Base Compressor Warranty | 7-Year |
| Base Remote Warranty | 5 Year |
| Registered Labor Warranty | None |
| Base Labor Warranty | None |
| Has Batteries | Yes |
| Contains Electronics | Yes |
| Contains Chemicals | Yes |
| Contains Compressed Gas | Yes |
| Proposition 65 Warning | Yes |
| Restricted States | GU, PR, VI |
| Gross Depth (In) | 17.24 |
| Gross Height (In) | 29.53 |
| Gross Width (In) | 40.55 |
| Gross Weight (Lbs) | 109.35 |
The MRCOOL® OLYMPUS 9K CASSETTE provides dependable heating and cooling for spaces up to 400 square feet, making it perfect for bedrooms, home offices, and smaller areas. Designed to fit seamlessly into the ceiling for a flush look, it almost disappears, creating a clean, modern aesthetic that complements any room style. Its versatile design is perfect for homes or businesses looking to maximize space while maintaining an elegant, high-performance climate solution. The indoor fan operates at a quiet 42 dB, ensuring a peaceful environment without compromising performance. This ultra-low noise level means you can enjoy consistent, efficient heating or cooling without disruptive fan sounds, ideal for spaces where silence is crucial, like bedrooms, offices, or nurseries. The quiet operation helps enhance the overall comfort of your space, providing a relaxing atmosphere free from distractions.
The unit uses R-454B refrigerant, an eco-friendly solution that provides top-tier performance while being environmentally responsible. With low global warming potential, R-454B helps reduce the environmental impact of your system, contributing to a greener, more sustainable home, without sacrificing performance or efficiency. This refrigerant is an important choice for homeowners seeking to lower their carbon footprint while still enjoying reliable performance.
The MRCOOL® OLYMPUS 9K CASSETTE comes with a limited lifetime warranty, 7-year compressor coverage, and a 5-year parts warranty, ensuring reliability, cutting-edge technology, and peace of mind. This unit is the ideal solution for homeowners who value efficiency, comfort, and modern design.
| Net Dimensions (In) | 22.44 D x 9.65 H x 22.44 W |
| Net Weight (Lbs) | 35.27 |
| Tonnage | 0.75 |
| Voltage (V) | 208/230 |
| Phase | 1 |
| Cycle | 60 |
| Max Fuse Breaker (A) | 15 |
| Min Circuit Ampacity (A) | 3 |
| Mount Type | Ceiling |
| Color | White |
| Max Coverage Area | Up to 400 |
| Refrigerant Type | R-454B |
| Decibel Rating (Dba) | 42.5/40/37.5/26/24 |
| Decibel Rating Low (Dba) | 24 |
| Decibel Rating High (Dba) | 42.5 |
| Air Flow Direction | Downflow |
| Number Of Speeds | 5 (Variable) |
| Oscillation | Yes |
| Lineset Fitting Type | Flare |
| Liquid Line Size | 4-Jan |
| Suction Line Size | 8-Mar |
| Blower Motor Speeds | 353.2/312/264.9/182.5/147.2 |
| Blower Motor Rpm | 600/530/380 |
| Filter Type | Reusable |
| Auxiliary Heater Included | No |
| Auxiliary Heater Available | No |
| Fan Only Option | Yes |
| Sleep Mode | Yes |
| Auto Cool | Yes |
| Wifi Compatibility | No |
| App Compatibility | No |
| Works With Ios | No |
| Works With Android | No |
| Remote Control Included | Yes |
| UL Listed | Yes |
| CSA Listed | Yes |
| ETL Listed | Yes |
| Base Warranty | 5-Year Parts |
| Base Parts Warranty | 5-Year |
| Base Remote Warranty | 5 Year |
| Registered Labor Warranty | None |
| Base Labor Warranty | None |
| Has Batteries | Yes |
| Contains Electronics | Yes |
| Contains Chemicals | Yes |
| Contains Compressed Gas | Yes |
| Proposition 65 Warning | Yes |
| Restricted States | GU, PR, VI |
| Gross Weight (Lbs) | 41.89 |
The MRCOOL® OLYMPUS 12K CASSETTE delivers reliable heating and cooling for areas up to 550 square feet, making it an excellent option for bedrooms, home offices, or other smaller spaces. Designed to be installed flush within the ceiling, it blends seamlessly into your room, offering a sleek, modern look that enhances any décor.
This versatile system is perfect for both residential and commercial spaces, maximizing room usage while providing an efficient and stylish climate control solution. Operating at a quiet 46 dB, the indoor fan ensures that your space remains calm and undisturbed while still delivering consistent performance. Its low noise level allows for optimal heating or cooling without distracting sounds, making it ideal for environments that require peace, such as bedrooms, home offices, or nurseries. The quiet operation creates a comfortable atmosphere that enhances relaxation and productivity. The system uses R-454B refrigerant, a sustainable choice that balances high performance with environmental responsibility. With its low global warming potential, R-454B minimizes the environmental impact of your unit while offering exceptional efficiency. This makes it a great option for homeowners looking to reduce their carbon footprint while still enjoying reliable, top-quality performance.
The MRCOOL® OLYMPUS 12K CASSETTE is backed by a limited lifetime warranty, 7 years of compressor coverage, and a 5-year parts warranty, ensuring lasting reliability and cutting-edge technology. This system is the perfect fit for those who prioritize energy efficiency, modern style, and optimal comfort.
| Net Dimensions (In) | 24.44 D x 9.65 H x 22.44 W |
| Net Weight (Lbs) | 35.27 |
| Tonnage | 1 |
| Voltage (V) | 208/230 |
| Phase | 1 |
| Cycle | 60 |
| Max Fuse Breaker (A) | 15 |
| Min Circuit Ampacity (A) | 3 |
| Mount Type | Ceiling |
| Color | White |
| Max Coverage Area | Up to 550 |
| Refrigerant Type | R-454B |
| Decibel Rating (Dba) | 46/43.5/40.5/27.5/26 |
| Decibel Rating Low (Dba) | 26 |
| Decibel Rating High (Dba) | 46 |
| Air Flow Direction | Downflow |
| Number Of Speeds | 5 (Variable) |
| Oscillation | Yes |
| Lineset Fitting Type | Flare |
| Liquid Line Size | 1/4 |
| Suction Line Size | 3/8 |
| Blower Motor Speeds | 417.9/364.9/306.1/194.2/147.2 |
| Blower Motor Rpm | 700/600/400 |
| Filter Type | Reusable |
| Auxiliary Heater Included | No |
| Auxiliary Heater Available | No |
| Fan Only Option | Yes |
| Sleep Mode | Yes |
| Auto Cool | Yes |
| Wifi Compatibility | No |
| App Compatibility | No |
| Works With Ios | No |
| Works With Android | No |
| Remote Control Included | Yes |
| UL Listed | Yes |
| CSA Listed | Yes |
| ETL Listed | Yes |
| Base Warranty | 5-Year Parts |
| Base Parts Warranty | 5-Year |
| Base Remote Warranty | 5 Year |
| Registered Labor Warranty | None |
| Base Labor Warranty | None |
| Has Batteries | Yes |
| Contains Electronics | Yes |
| Contains Chemicals | Yes |
| Contains Compressed Gas | Yes |
| Proposition 65 Warning | Yes |
| Restricted States | GU, PR, VI |
| Gross Weight (Lbs) | 41.89 |
What BTU rating should I choose for my air handler?
| Air Handler BTU | Coverage Area/Room Size (Sq. Ft.)* |
| 6K |
Up to 200 Sq. Ft.
|
| 9K |
Up to 375 Sq. Ft.
|
| 12K | Up to 500 Sq. Ft. |
| 18K | Up to 750 Sq. Ft. |
| 24k | Up to 1,000 Sq. Ft. |
| 36k | Up to 1,500 Sq. Ft. |
*Ceiling height, insulation, and local climate may impact the coverage area. For example, an uninsulated room will require more power than a well insulated room.
