The MRCOOL® Olympus MULTI4-27HP230C-O is a powerful 27,000 BTU multi-zone heat pump condenser capable of supporting up to four indoor units at once. Ideal for homeowners aiming to maintain precise temperature control in multiple areas, this ductless system allows for customized climate settings in each zone, offering a versatile and energy-smart solution for today’s homes. Engineered with advanced inverter technology, it boasts impressive energy efficiency—reaching SEER2 ratings up to 25 and HSPF2-4 up to 9.5. Designed to perform in a wide range of outdoor temperatures, this unit remains reliable even in cold weather down to 5°F, delivering year-round comfort. It’s also compatible with a variety of MRCOOL indoor unit types, including wall-mounted, ceiling cassette, and concealed duct options, making it easy to tailor the system to your home’s design and needs.
Convenience is built in, with smart control options like the MRCOOL SmartHVAC app, handheld remotes, or voice control via Amazon Alexa and Google Assistant. Additional features such as sleep mode, auto restart, and refrigerant leak detection provide added safety, ease of use, and peace of mind. Covered by a 7-year compressor warranty and a 5-year parts warranty (when professionally installed), the MRCOOL® Olympus MULTI4-27HP230C-O is a dependable, high-efficiency choice for those seeking flexible, zone-specific heating and cooling.
| Net Dimensions (In) | 16.14 D x 31.89 H x 37.24 W |
| Net Weight (Lbs) | 138.89 |
| SEER2 | Up to 25 |
| EER2 | Up to 13 |
| HSPF2-4 | 9.5 |
| HSPF2-5 | 7 |
| TONNAGE | 2.25 |
| Cooling Capacity (Btu) | 27000 |
| Heating Capacity (Btu) | 27000 |
| Voltage (V) | 208/230 |
| Phase | 1 |
| Cycle | 60 |
| Max Fuse Breaker (A) | 25 |
| Min Circuit Ampacity (A) | 23 |
| Color | White |
| Max Coverage Area | Up to 1125 |
| Zone Capacity | 4 |
| Refrigerant Type | R-454B |
| Refrigerant Volume (Oz) | 84.66 |
| Decibel Rating (Dba) | 61 |
| Inverter | DC |
| Max Lineset Length (Ft) | 262.4 total |
| Lineset Fitting Type | Flare |
| Liquid Line Size | 4 x 1/4 |
| Suction Line Size | 3 x 3/8 + 1 x 1/2 |
| Compressor Motor Type | Rotary |
| Condenser Fan Motor Rpm | 800/700/650 |
| Metering Device | EXV |
| UL Listed | Yes |
| CSA Listed | Yes |
| ETL Listed2 | 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) | 19.68 |
| Gross Height (In) | 34.84 |
| Gross Width (In) | 42.91 |
| Gross Weight (Lbs) | 149.69 |
Enjoy peace of mind and reliable comfort with the MRCOOL® OLYMPUS ESTAR® 18k Series air handler, designed to efficiently heat and cool areas up to 800 square feet—making it an ideal choice for large rooms, offices, garages, and more. Thanks to its compact design, installation is fast and straightforward. Control your comfort from anywhere with the MRCOOL® Smart HVAC app, which allows Wi-Fi connectivity for remote access via your smartphone or tablet. For added convenience, the unit also includes a wireless remote control, giving you flexible options to manage your indoor climate with ease. Engineered for energy efficiency, this system features a SEER2 rating of 23.5, EER2 of 12.7, and HSPF2-4 of 10.8, helping you lower your utility costs while staying comfortable year-round. With multiple fan speed settings and whisper-quiet operation at just 49 dB, it delivers powerful performance with minimal noise. Now using R-454B refrigerant, a more eco-friendly choice, this unit supports environmentally conscious living without sacrificing performance. Enjoy seamless control options, including the smartHVAC app, wireless remote, and voice control compatibility with Amazon Alexa and Google Assistant, giving you personalized comfort at your fingertips. Backed by an industry-leading warranty—including a limited lifetime warranty, 7-year compressor warranty, and 5-year parts warranty—the MRCOOL® OLYMPUS ESTAR® 18k Series air handler offers dependable performance, smart technology, and lasting comfort throughout the seasons.
| Net Dimensions (In) | 9.69 D x 12.64 H x 40.31 W |
| Net Weight (Lbs) | 27.34 |
| Tonnage | 1.5 |
| Voltage (V) | 208/230 |
| Phase | 1 |
| Cycle | 60 |
| Max Fuse Breaker (A) | 15 |
| Min Circuit Ampacity (A) | 3 |
| Mount Type | Wall |
| Color | White |
| Max Coverage Area | Up to 800 |
| Refrigerant Type | R-454B |
| Decibel Rating (Dba) | 49.5/45/38/31.5/19.5 |
| Decibel Rating Low (Dba) | 19.5 |
| Decibel Rating High (Dba) | 49.5 |
| Number Of Speeds | 5 (Variable) |
| Oscillation | Yes |
| Lineset Fitting Type | Flare |
| Liquid Line Size | 1/4 |
| Suction Line Size | 1/2 |
| Blower Motor Speeds | 635.7/500.3/359/294.3/294.3 |
| Blower Motor Rpm | 1190/994/896 |
| Filter Type | Reusable |
| Auxiliary Heater Included | No |
| Auxiliary Heater Available | No |
| Fan Only Option | Yes |
| Sleep Mode | Yes |
| Auto Cool | Yes |
| Wifi Compatibility | Yes |
| App Compatibility | Yes |
| Works With Ios | Yes |
| Works With Android | Yes |
| 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 Depth (In) | 12.8 |
| Gross Height (In) | 15.75 |
| Gross Width (In) | 43.11 |
| Gross Weight (Lbs) | 36.6 |
This remote is included with each air handler in MRCOOL's 5th Generation DIY or Advantage Mini Split Systems.
| Dimensions | 2" W x 6" L x 1" H |
| Works with | MRCOOL DIY 5th Generation Mini Splits |
| Restricted States | GU;PR;VI |
| Color | White |
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.
