MRCOOL Olympus Multi-Zone 4th Gen — Multi-Zone Mini-Split Heat Pump System
MRCOOL Olympus 4th Generation 4-Zone Ducted Mini Split AC & Heat Pump 36000 BTU (9K+9K+9K+18K), Slim Duct Units, 230V
Concealed slim-duct comfort with a discreet, flush installation—premium efficiency and smart control for professionally installed zoning.
Overview
36000 BTU
4 Zones
24 SEER2
Operates to -13°F
Concealed Slim Duct
Wired Controller + Remote
R-454B
The Olympus Duct Air Handler features a ceiling-integrated design for a discreet, flush installation that blends into your space—ideal where aesthetics and space efficiency matter.
System Combination
MULTI5-36HP230C-O + 3X DUCT-09HP-230B-O + DUCT-18HP-230B-O
MULTI5-36HP230C-O + 3X DUCT-09HP-230B-O + DUCT-18HP-230B-O
Outdoor Model
MULTI5-36HP230C-O
MULTI5-36HP230C-O
Min Circuit Ampacity
30.5
30.5
Max Fuse / Breaker
35
35
Install note: This is not a DIY system—installation must be completed by an authorized dealer/specialist.
Why Homeowners Love It
- Discreet look: Ceiling-integrated, flush installation that blends into modern interiors.
- Convenient controls: Includes both a wall-mounted wired controller and a handheld remote for simple daily use.
- Multi-zone flexibility: Combine ducted handlers with other compatible indoor styles as needed (system runs in heat or cool mode across the system).
- High efficiency: Advanced inverter technology supports excellent SEER2/HSPF2 performance (model dependent).
- Eco-conscious refrigerant: R-454B.
What’s Included
- (1) Outdoor condenser: MULTI5-36HP230C-O
- Indoor units (slim-duct / concealed duct air handlers):
- 9,000 BTU (x3) — Model: DUCT-09HP-230B-O
- 18,000 BTU (x1) — Model: DUCT-18HP-230B-O
Refrigerant line sets and install materials may be option-based: if an installation kit is not selected, it will not be included. Select the appropriate line length for each indoor unit based on your layout.
Mrcool Olympus Multi-Zones
Key Features
- Ceiling-integrated slim duct design for a sleek, space-saving installation.
- Controls included: wired wall controller + handheld remote for easy day-to-day adjustments.
- Smart control options: SmartHVAC app and voice assistants (Alexa/Google) plus included controls (varies by configuration).
- Reliability features: sleep mode, auto restart, and refrigerant leak detection designed to keep the system running smoothly.
- Eco-conscious refrigerant: R-454B.
Comfort Modes
- Auto: Automatically selects heating or cooling to maintain setpoint.
- Cool / Heat: Dedicated modes for seasonal comfort.
- Dry: Dehumidifies while maintaining comfort.
- Sleep: Energy-saving overnight profile.
- Timer: Scheduled on/off for efficiency.
Warranty
Common coverage includes a 7-year compressor warranty and a 5-year parts warranty (when professionally installed; registration/terms apply).
Extended limited lifetime replacement coverage may be available when enrolled in the MRCOOL® Care Kit Program (fees/conditions apply).
Indoor Specs
Indoor Unit Specifications — DUCT-09HP-230B-O
| brand name | MRCOOL |
|---|---|
| series | Olympus Duct |
| model | DUCT-09HP-230B-O |
| unit type | Mini-Split |
| short description | Olympus 9,000 BTU 3/4 Ton Ducted Mini-Split Air Handler - 230V/60Hz |
| long description | The MRCOOL® OLYMPUS 9K DUCT Air Handler is a reliable solution for heating and cooling spaces up to 400 square feet, making it an excellent fit for bedrooms, home offices, or other compact areas. Its ceiling-integrated design allows for a discreet, flush installation that blends effortlessly into any interior, providing a sleek and contemporary appearance. This space-saving setup is ideal for both residential and light commercial environments where aesthetics and functionality are equally important. For convenient operation, the unit includes both a wall-mounted wired controller and a handheld remote, allowing you to adjust your settings from across the room or right at your fingertips. Whether you're relaxing on the couch or managing temperature throughout the day, controlling your climate is simple and user-friendly. The air handler utilizes R-454B refrigerant, a next-generation, eco-conscious option that combines high performance with environmental responsibility. Its low global warming potential (GWP) significantly reduces the unit’s ecological impact while maintaining energy efficiency and reliable operation. For environmentally mindful homeowners, R-454B is a smart choice that supports sustainability without compromising performance. Backed by a limited lifetime warranty, 7-year compressor coverage, and a 5-year parts warranty, the MRCOOL® OLYMPUS 9K DUCT Air Handler is built to deliver dependable, long-term comfort. It’s a perfect solution for those who appreciate energy efficiency, quiet operation, and sleek design all in one dependable system. |
| works with | O-ES-09-HP-C-230C-O1 MULTI3-18HP230C-O MULTI4-27HP230C-O MULTI5-36HP230C-O MULTI6-48HP230C-O |
| tonnage | 0.75 |
| voltage (v) | 208/230 |
| phase | 1 |
| cycle (hz) | 60 |
| max fuse breaker (a) | 15 |
| min circuit ampacity (a) | 3.0 |
| mount type | Ducted |
| color | Metal |
| max coverage area | Up to 400 |
| refrigerant type | R-454B |
| decibel rating (dba) | 32.5/32.5/31/29.5/23 |
| decibel rating low (dba) | 23.0 |
| decibel rating high (dba) | 32.5 |
| air flow direction | Ducted |
| number of speeds | 5 (Variable) |
| oscillation | No |
| lineset fitting type | Flare |
| liquid line size | 1/4 |
| suction line size | 3/8 |
| blower motor speeds | 323.7/264.9/206/147.2/117.7 |
| blower motor rpm | 850/680/450 |
| 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 |
| net depth (in) | 19.92 |
| net height (in) | 7.87 |
| net width (in) | 27.56 |
| net weight | 39.46 |
| gross weight (lbs) | 46.74 |
Indoor Unit Specifications — DUCT-18HP-230B-O
| brand name | MRCOOL |
|---|---|
| series | Olympus Duct |
| model | DUCT-18HP-230B-O |
| unit type | Mini-Split |
| short description | Olympus 18,000 Btu 1.5 Ton Ducted Mini-Split Air Handler - 230V/60Hz |
| long description | The MRCOOL® OLYMPUS 18K DUCT Air Handler delivers dependable heating and cooling for areas up to 800 square feet, making it an excellent solution for spacious bedrooms, home offices, or compact commercial spaces. Its low-profile, ceiling-concealed installation allows it to virtually disappear from view, maintaining a clean and modern interior without sacrificing performance. Designed with versatility in mind, this system seamlessly blends into residential or light commercial environments, offering both elegance and efficiency in one compact package. Whether you're looking to optimize comfort at home or in a workspace, this unit is engineered to provide precise climate control without dominating your space. Control is effortless thanks to the included wired wall-mounted controller and handheld remote. Adjusting your temperature preferences is simple and convenient—no need to interrupt your routine or leave your seat. Environmentally conscious performance is also a hallmark of this system, utilizing advanced R-454B refrigerant. This low global warming potential refrigerant provides outstanding heating and cooling while significantly reducing your carbon footprint. It's an ideal choice for anyone seeking high performance paired with sustainability. The MRCOOL® OLYMPUS 18K DUCT Air Handler is backed by a limited lifetime warranty, along with 7-year compressor protection and a 5-year parts warranty. It’s the perfect choice for those who prioritize comfort, energy efficiency, and modern convenience in a sleek, discreet design. |
| works with | O-ES-18-HP-C-230C-O1 MULTI4-27HP230C-O MULTI5-36HP230C-O MULTI6-48HP230C-O |
| tonnage | 1.5 |
| voltage (v) | 208/230 |
| phase | 1 |
| cycle (hz) | 60 |
| max fuse breaker (a) | 15 |
| min circuit ampacity (a) | 3.0 |
| mount type | Ducted |
| color | Metal |
| max coverage area | Up to 800 |
| refrigerant type | R-454B |
| decibel rating (dba) | 40/40/39/38/32 |
| decibel rating low (dba) | 32.0 |
| decibel rating high (dba) | 40.0 |
| air flow direction | Ducted |
| number of speeds | 5 (Variable) |
| oscillation | No |
| lineset fitting type | Flare |
| liquid line size | 1/4 |
| suction line size | 1/2 |
| blower motor speeds | 600.4/559.2/500.3/441.4/441.4 |
| blower motor rpm | 780/700/550 |
| 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 |
| net depth (in) | 26.54 |
| net height (in) | 8.27 |
| net width (in) | 34.65 |
| net weight | 54.45 |
| gross weight (lbs) | 66.14 |
Manuals
- https://doxrepo.mrcool.com/mc-oly-mz-4g-duct-im-en-01.pdf
- https://doxrepo.mrcool.com/mc-oly-mz-4g-duct-wt-im-en.pdf
- https://doxrepo.mrcool.com/mc-oly-mz-4g-duct-9-18-sm-en-01.pdf
Documents
Warranty
Outdoor Specs
Outdoor Unit Specifications — MULTI5-36HP230C-O
| brand name | MRCOOL |
|---|---|
| series | Olympus 4th Gen Multi-Zone Condensers |
| model | MULTI5-36HP230C-O |
| unit type | Mini-Split |
| short description | Olympus 36,000 BTU Mini-Split Condenser - 230V/60Hz |
| long description | The MRCOOL® Olympus 36,000 BTU multi-zone heat pump condenser is a high-capacity, heat pump condenser built to power up to five indoor units simultaneously. Designed for homeowners who want efficient and individualized temperature control across multiple rooms, this ductless system delivers tailored comfort to every zone—making it an excellent fit for modern, multi-room living spaces. Featuring cutting-edge inverter technology, the system provides exceptional energy performance, with SEER2 ratings up to 24 and HSPF2-4 up to 9.5. It operates reliably even in extreme outdoor conditions, functioning in temperatures as low as 5°F to keep your home comfortable year-round. Compatibility with a variety of MRCOOL indoor units—including wall-mounted, ceiling cassette, and concealed duct options—means it’s easy to customize the setup to suit your home’s layout and aesthetic. Smart control options enhance everyday convenience, offering seamless operation through the MRCOOL SmartHVAC app, included remote control, or voice commands via Amazon Alexa and Google Assistant. Additional features like sleep mode, auto restart, and built-in refrigerant leak detection further improve safety, energy efficiency, and peace of mind. Backed by a 7-year limited warranty on the compressor and a 5-year parts warranty (when installed by a professional), the MRCOOL® Olympus MULTI5-36HP230C-O is a reliable, energy-efficient choice for those looking to achieve flexible, zone-specific heating and cooling throughout their home. |
| works with | O-09-HP-WMAH-230C-O DUCT-09HP-230B-O CASSETTE09HP-230C-O O-12-HP-WMAH-230C-O DUCT-12HP-230B-O CASSETTE12HP-230C-O O-18-HP-WMAH-230C-O DUCT-18-HP-230B-O CASSETTE18HP-230C-O O-24-HP-WMAH-230C-O DUCT-24HP-230B-O CASSETTE24HP-230C-O |
| feature list | Installation by a licensed professional required where applicable 7-Year Compresser, 5-Year Parts warranty when registered and installed by a licensed professional R-454B environmentally friendly friendly refrigerant Energy Star Certified |
| seer2 | Up to 24 |
| eer2 | Up to 12 |
| hspf2-4 | 9.5 |
| hspf2-5 | 7.0 |
| tonnage | 3.0 |
| cooling capacity (btu) | 36000.0 |
| heating capacity (btu) | 37000.0 |
| voltage (v) | 208/230 |
| phase | 1 |
| cycle (hz) | 60 |
| max fuse breaker (a) | 35 |
| min circuit ampacity (a) | 30.5 |
| color | White |
| max coverage area | Up to 1500 |
| zone capacity | 5.0 |
| refrigerant type | R-454B |
| refrigerant volume (oz) | 120.63 |
| decibel rating (dba) | 64.5 |
| inverter | DC |
| max lineset length (ft) | 262.4 total |
| lineset fitting type | Flare |
| compressor motor type | Rotary |
| condenser fan motor rpm | 900/750/600 |
| metering device | EXV |
| 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 |
| net depth (in) | 16.14 |
| net height (in) | 31.89 |
| net width (in) | 37.24 |
| net weight | 168.87 |
| gross depth (in) | 19.68 |
| gross height (in) | 34.84 |
| gross width (in) | 42.91 |
| gross weight (lbs) | 180.12 |
Manuals
- https://doxrepo.mrcool.com/mc-oly-mz-4g-im-um-en-01.pdf
- https://doxrepo.mrcool.com/mc-oly-mz-4g-sm-en-01.pdf
Documents
Warranty
Helpful Notes
Professional installation required
Installation must be performed by an authorized dealer/specialist. Improper installation can cause water leakage, electrical shock, or fire.
System operation (heat vs cool)
Multi-zone condensers can heat or cool multiple rooms, but they cannot do both at the same time. The system runs entirely in heating or cooling mode.
Refrigerant piping, evacuation, and line set selection
This system requires standard professional refrigerant piping practices, including evacuation with a vacuum pump/manifold gauge per the installation manual. Select the correct line length for each head; if an installation kit is not selected, it will not be included.
Line sizing
Indoor line sizes: 1/4 / 3/8 | 1/4 / 1/2. Confirm final line sizes and allowable lengths for your exact pairing before selecting a line set.
