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- SEER2 rating helps consumers compare energy efficiency when choosing a new air conditioner. Higher SEER2 ratings mean significant utility savings. The federal minimum is 14 SEER2 with ratings into the 20 SEER2 range. A 20 SEER2 uses half the energy of a 10 seer much like MPG ratings for vehicles.
- Heat pumps are all electric and good for mild and cold climates.
MRCOOL Olympus 9,000 BTU Ductless Mini Split Heat Pump System, 115V – 4th Generation | Single Zone, 27.4 SEER2, R454B
- Outdoor Unit: O-ES-09-HP-C-230C-O1
- Indoor Unit: O-09-HP-WMAH-230C-O
- Controller: Included With Indoor Unit
Mini Split Sizing BTU Calculator
Use this Free & Easy Mini Split BTU Calculator to Select the Right Size Mini Split AC or Heat Pump for your Home.
When using a mini split sizing calculator for rooms below a conditioned space, apply an additional .7 factor to your final Btu outcome.
For example, if your Btu requirement via this calculator is 18,000 Btu's: 18,000 Btu's x .7 factor = 12,600 Btu's required. When in doubt, it is okay to go up a size or two. Unlike standard non-variable systems, The mini split inverter technology allows the system to adjust to the actual room requirements in both heating and cooling.
- SEER2 rating helps consumers compare energy efficiency when choosing a new air conditioner. Higher SEER2 ratings mean significant utility savings. The federal minimum is 14 SEER2 with ratings into the 20 SEER2 range. A 20 SEER2 uses half the energy of a 10 seer much like MPG ratings for vehicles.
- Heat pumps are all electric and good for mild and cold climates.
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MrCool 9,000 BTU 230V Mini Split Heat Pump Condenser – Olympus 4th Generation Outdoor Unit
Model Number
O-ES-09-HP-C-230C-O1
Dimensions
31.69" W x 12.99" D x 21.81" H
Documents
Warranty
5 Year Parts, 7 Year Compressor
MrCool 9,000 BTU 230V Wall Mount Mini Split Air Handler – Olympus 4th Generation Indoor Unit
Model Number
O-24-HP-WMAH-230C-O
Dimensions
47.13" W x 11.02" D x 14.61" H
Documents
Warranty
5 Year Parts, 7 Year Compressor
AHRI Number
217666290
MrCool Olympus ENERGY STAR 9,000 BTU Mini Split Heat Pump Condenser Overview
Premium Outdoor Unit, ENERGY STAR Certified, Eco-Friendly R-454B
The MrCool Olympus ENERGY STAR 4th Generation 9,000 BTU Mini Split Heat Pump Condenser delivers dependable year-round heating and cooling for spaces up to 400 sq. ft. — perfect for rooms, home offices, garages, and other compact areas. Its space-saving design makes outdoor installation fast and straightforward for a licensed HVAC professional, even in tight or unconventional spaces.
ENERGY STAR Certified Efficiency
With a 25.8 SEER2 rating, 14.9 EER2, and 12.5 HSPF2-4, this condenser delivers excellent energy efficiency — helping you reduce utility costs while qualifying for state and federal energy rebates and heat pump tax credits. ENERGY STAR certification means it meets strict EPA efficiency guidelines.
Smart Control, Your Way
Pair with a compatible MRCOOL Olympus indoor unit to unlock full smart control through the MRCOOL Smart HVAC app (iOS & Android) via built-in WiFi. Adjust temperature, set schedules, and monitor your system from anywhere. Works hands-free with Amazon Alexa and Google Assistant, and includes a wireless remote for traditional control.
Advanced Inverter Compressor
DC inverter-driven rotary compressor adjusts output to match your exact heating and cooling demand — eliminating the temperature swings and energy waste of traditional single-stage HVAC while delivering quieter, more consistent comfort.
Quiet Outdoor Operation
Operating at just 52.5 dB, the Olympus condenser runs quietly enough to install close to bedrooms, patios, and outdoor living spaces without disruption — a significant upgrade over traditional central AC compressors.
Eco-Friendly R-454B Refrigerant
Built for the future, the Olympus 4th Gen uses next-generation R-454B refrigerant — a low-GWP (global warming potential) option that meets upcoming EPA refrigerant transition requirements while delivering strong heating and cooling performance.
Built to Last
Corrosion-resistant construction stands up to coastal and humid climates. Premium components and rigorous quality control mean years of reliable operation in any environment.
Multi-Zone Compatible
Use as a single-zone condenser paired with a matching Olympus wall-mount air handler, or expand your system with compatible MRCOOL ducted and cassette indoor units for whole-home comfort.
Peace of Mind
Backed by an industry-leading warranty when registered and installed by a licensed professional:
- Limited Lifetime Warranty on the unit
- 7-Year Compressor Warranty
- 5-Year Parts Warranty
Features
- 9,000 BTU cooling & heating capacity (3/4 Ton) — covers up to 400 sq. ft.
- 25.8 SEER2 | 14.9 EER2 | 12.5 HSPF2-4 — ENERGY STAR certified
- 230V (208/230V) power supply, single-phase, 60 Hz
- R-454B refrigerant — next-generation, low-GWP, eco-friendly
- DC inverter-driven rotary compressor
- Quiet outdoor operation at 52.5 dB
- Corrosion-resistant construction for coastal & humid climates
- Electronic expansion valve (EXV) metering for precise refrigerant control
- Flare lineset fittings — professional install required
- Multi-zone compatible with MRCOOL wall-mount, ducted, and cassette indoor units
- ENERGY STAR certified | AHRI certified | ETL listed
Who installs the AC unit after I purchase it?
ACDirect does not yet provide installation services directly. However, most of our customers successfully arrange installation through local licensed HVAC contractors. These systems are designed for professional installation and typically include the components your installer will need.
Here’s how it works:
- Hire a licensed HVAC technician in your area
- Use platforms like Angi, Thumbtack, or a local HVAC directory to find reliable professionals
- Confirm your installer is experienced with the system type you’re purchasing
Note:
Please be aware if you choose to install HVAC equipment yourself and don’t possess proper HVAC licensing, you will void the manufacturer’s factory warranty. If you are capable of a factory-compliant installation yourself, you will need a licensed HVAC contractor to sign off on your work, fully confirming factory-compliant workmanship.
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