Mr. Cool DIYS-18-HP-230A11-O 18,000 BTU 17.3 SEER2 Select Black Wall Mounted Heat Pump System (230V) - R454B

MRCOOL® DIYS-18-HP-230A11-O DIY® Select 1st Gen 18,000 BTU 230V – R-454B Ductless Mini-Split Heat Pump System (Air Handler + Condenser)

The MRCOOL® DIYS-18-HP-230A11-O DIY® Select 1st Gen 18,000 BTU 230V ductless mini-split delivers dependable, energy-efficient heating and cooling for spaces up to approximately 800 sq. ft. Designed as part of MRCOOL's innovative DIY® Select Series, this system allows homeowners to install their own comfort system using the included factory pre-charged Quick Connect® line set , eliminating the need for specialized HVAC tools, vacuum pumps, or refrigerant charging. Utilizing environmentally friendly R-454B refrigerant , the system reduces Global Warming Potential (GWP) while delivering reliable year-round comfort.

Built for modern convenience, the system includes built-in Wi-Fi , allowing complete control through the MRCOOL® SmartHVAC (Comfort) App . Adjust temperatures, create schedules, monitor system performance, and control your unit from virtually anywhere. The system is also compatible with Amazon Alexa and Google Assistant , making voice-controlled comfort simple. Advanced inverter technology, multiple operating modes, and whisper-quiet performance help maintain consistent temperatures while minimizing energy consumption. 

Rated up to 17.3 SEER2 and 8.5 HSPF2-4 , the DIY® Select provides outstanding efficiency for both heating and cooling applications. The outdoor condenser features a Gold Fin® corrosion-resistant coating for enhanced durability in harsh environments, while the included DIYPRO® communication cable simplifies installation by replacing traditional conduit and protecting wiring from moisture, pests, and weather exposure. MRCOOL® backs the system with a 1-year parts warranty , 2-year compressor warranty , and 1-year remote warranty for dependable long-term performance.

General Information

System Type: Ductless mini-split heat pump (indoor air handler + outdoor condenser)
System Model: DIYS-18-HP-230A11-O
Indoor Model: DIY® Select 1st Gen 18,000 BTU 230V Air Handler
Outdoor Model: DIY® Select 1st Gen 18,000 BTU 230V Condenser
Capacity: 18,000 BTU Cooling / Heating
Room Size: Up to ~800 sq. ft.
Operating Modes: Heating & Cooling
Refrigerant: R-454B (eco-friendly, low GWP)
Voltage: 208/230V, 1 Phase, 60Hz

Key Features

• True DIY installation with factory pre-charged Quick Connect® line set

• Eco-friendly R-454B refrigerant with reduced Global Warming Potential

• Up to 17.3 SEER2 cooling efficiency

• Up to 8.5 HSPF2-4 heating efficiency

• Built-in Wi-Fi with MRCOOL® SmartHVAC app compatibility

• Compatible with Amazon Alexa and Google Assistant

• Gold Fin® corrosion-resistant outdoor coil coating

• Quiet operation with indoor sound levels as low as 18.5 dBA

• Variable-speed DC inverter compressor for improved efficiency

• DIYPRO® communication cable included for simplified installation

• Multiple comfort modes including Auto, Heat, Cool, Dry, Fan, and Sleep

• Programmable timer and scheduling

• Auto Restart after power interruptions

• Washable, reusable air filter

• Wireless remote control included

• 1-year parts warranty

• 2-year compressor warranty

• 1-year remote warranty

Specifications (Rated Conditions)

Cooling Capacity: 18,000 BTU
Heating Capacity: 18,000 BTU
SEER2: Up to 17.3
HSPF2-4: 8.5
Voltage: 208/230V
Coverage Area: Up to ~800 sq. ft.
Refrigerant: R-454B
Maximum Line Set Length: 75 ft.

Included Components

• DIY® Select 18,000 BTU 230V indoor air handler

• DIY® Select 18,000 BTU 230V outdoor condenser

• 11.5 ft. factory pre-charged Quick Connect® line set

• 13 ft. DIYPRO® communication cable

• Wireless remote control

• Installation accessories

Ideal For

Homeowners looking for a simple, do-it-yourself ductless heating and cooling solution for living rooms, garages, workshops, finished basements, home offices, additions, and other spaces up to approximately 800 sq. ft. The DIY® Select Series combines fast installation, smart home connectivity, energy-efficient inverter technology, and dependable year-round comfort without requiring professional refrigerant handling.