MRCOOL Olympus 12K 230V Mini Split System – 4th Generation

The MRCOOL Olympus 12K 230V 4th Gen Mini Split System is a complete single-zone ductless heat pump engineered to deliver ultra-high-efficiency heating and cooling without conventional ductwork. It pairs the O-ES-12-HP-C-230C-O1 outdoor condenser with the matching O-12-HP-WMAH-230C-O wall-mounted indoor air handler.

This 230V system delivers 12,000 BTU of nominal cooling capacity and 12,000 BTU of heating capacity. Actual coverage depends on climate, insulation, windows, ceiling height, construction, occupancy, and other load factors. Perform a proper load calculation prior to equipment selection.

MRCOOL Olympus 4th Gen 12K 230V Mini Split System Overview

The MRCOOL Olympus 4th Gen 12K 230V Mini Split System utilizes variable-speed DC inverter technology to adjust compressor output according to current thermal demand. This continuous operation maintains steady room comfort while minimizing energy consumption compared to conventional single-speed equipment.

Engineered for extreme performance, this matched 208/230V system delivers an outstanding efficiency rating of up to 25.4 SEER2 and 10.5 HSPF2 for industry-leading year-round comfort and energy savings.

What’s Included

• Outdoor condenser (230V): MRCOOL O-ES-12-HP-C-230C-O1
• Indoor air handler (230V): MRCOOL O-12-HP-WMAH-230C-O
• Controls: Wireless remote control and integrated Wi-Fi smart control
• Configuration: Single-zone ductless heat pump system (230V)

Refrigerant line set (1/4″ × 3/8″), electrical components, disconnect boxes, and mounting accessories are not included and must be supplied separately. Requirements depend on the installation layout and applicable building codes.

Key Features

• 208/230V electrical power supply
• 12,000 BTU nominal cooling capacity
• 12,000 BTU nominal heating capacity
• High-efficiency 25.4 SEER2 cooling efficiency
• 10.5 HSPF2 heating efficiency
• Variable-speed DC inverter compressor technology
• Single-zone ductless heating and cooling
• Next-generation R-454B low-GWP refrigerant platform
• Integrated Wi-Fi smart control capability
• Requires standard 1/4″ × 3/8″ copper line set (sold separately)
• Follow Me®, Quiet, Sleep, Timer, and Auto operating modes
• Gold Fin® anti-corrosive condenser coating

Technical Specifications

• Brand: MRCOOL
• Series: Olympus 4th Generation
• Outdoor model: O-ES-12-HP-C-230C-O1
• Indoor model: O-12-HP-WMAH-230C-O
• System type: Single-zone ductless heat pump
• Cooling capacity: 12,000 BTU
• Heating capacity: 12,000 BTU
• Nominal capacity: 1.0 tons
• SEER2: 25.4
• HSPF2: 10.5
• Voltage / Electrical: 208/230V / 60Hz / 1Ph
• Phase: Single phase (1Ph)
• Frequency: 60 Hz
• Refrigerant: R-454B
• Line set size: 1/4″ × 3/8″
• Line set included: No (Supplied separately)

MRCOOL Olympus 12K 230V 4th Gen System Compatibility

The MRCOOL Olympus 4th Gen 12K Mini Split System (230V) requires the specific matched 208/230V indoor and outdoor components listed. Equipment across different generations, voltages, or product series must not be interchanged unless explicitly specified by MRCOOL documentation.

This 230V ductless system is an ideal choice for bedrooms, additions, renovated spaces, home offices, and small residential zones requiring high heating performance.

Smart Comfort Controls

The MRCOOL Olympus 4th Gen 12K 230V Mini Split System features integrated Wi-Fi functionality for mobile app control on iOS and Android devices. Users can adjust temperature setpoints, select operating modes, configure schedules, and control comfort remotely.

Voice command support is available through Amazon Alexa and Google Assistant integrations. The Follow Me® mode uses the remote control’s internal temperature sensor to gauge comfort directly near the user rather than at the wall unit.

R-454B Refrigerant Information

The MRCOOL Olympus 4th Gen 12K 230V Mini Split System uses eco-friendly R-454B refrigerant. Line sizing (1/4″ × 3/8″), flare connections, leak testing, and vacuum evacuation must strictly follow MRCOOL installation instructions and standard EPA guidelines for A2L refrigerants. R-454B must not be mixed with R-410A or any other refrigerant.

Ensure line-set length and vertical lift conform to manufacturer limits prior to piping installation.

Warranty and Official Documentation

The MRCOOL Olympus 4th Gen 12K 230V Mini Split System is backed by MRCOOL’s standard limited warranty from the date of purchase. Warranty coverage is contingent upon installation compliance and registration according to manufacturer terms.

Review the official MRCOOL Olympus 4th Gen product brochure before installation and setup.

Professional Installation Notice

Unlike Quick Connect® DIY systems, the MRCOOL Olympus 4th Gen 12K 230V Mini Split System requires conventional flare copper piping connections, line set evacuation, pressure testing, and additional refrigerant charge calculations if line length exceeds factory allowance. Installation must be completed by a qualified HVAC technician to ensure proper operation, safety, and full warranty validity.

The outdoor condenser requires a dedicated 230V dedicated electrical circuit. Electrical wiring and circuit protection must comply with the National Electrical Code and local regulations.

Browse additional ductless mini split systems to compare available capacities and electrical requirements before choosing your system.