MRCOOL 18K BTU 20 SEER DIY Ductless Mini-Split Heat Pump AC $1,972.00
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MRCOOL 18000 BTU 20 SEER Ductless DIY Mini-Split Heat Pump & A/C system includes – MRCOOL 18 SEER Heat Pump Condenser DIY-18-HP-C-230B, MRCOOL Variable Speed Air Handler DIY-18-HP-WMAH-230B…

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Square Installments

MRCOOL 18000 BTU 20 SEER Ductless Mini-Split Heat Pump system from the E Star Do It Yourself series is a solid indoor solution for your heating and air conditioning needs. This 18K BTU-rated heat pump is capable of both heating and cooling areas up to 750 square feet. Its DC inverter technology, along with the 20 SEER rating, minimizes energy consumption, saving thousands on annual energy costs.

Besides, this DIY series mini-split ductless heat pump system can be programmed and controlled remotely with MRCOOL’s SmartHVAC module. For a quick, easy and hands-free experience, this HVAC unit also connects to Amazon Alexa and Google Assistant.


MRCOOL 18000 BTU 20 SEER Ductless DIY Mini-Split Heat Pump & A/C system includes –

  1. MRCOOL 18 SEER Heat Pump Condenser DIY-18-HP-C-230B
  2. MRCOOL Variable Speed Air Handler DIY-18-HP-WMAH-230B


Features of MRCOOL 20 SEER 18K BTU Do It Yourself 3rd Gen Mini-Split Ductless Heat Pump A/C System

  • Easy quick connect
  • Auto-restart functionality
  • Superior comfort
  • Compatible with both iOS & Android devices
  • 18000 BTU heating & cooling capacity
  • Support for Google Assistant & Amazon Alexa
  • Heating & cooling coverage up to 750 sq. ft.
  • Corrosion-resistant Gold Fin Condenser
  • Low ambient cooling (5°F) for server room, greenhouse, etc.
  • Louver Position Memory that remembers your position
  • Wall mount accessibility
  • Follow Me® Function for personalized performance
  • WiFi control & programmable SmartHVAC module
  • Three cooling options
  • Four-way air circulation
  • Easy Do-It-Yourself (DIY) installation
  • Automatic leak detection technology to protect the equipment
  • Variable fan speed
  • Sleep mode to ensure 24-hour comfort
  • 18 SEER & 10 HSPF efficiency rating
  • DC inverter compressor technology that saves energy cost
  • Single zone capacity
  • Environment-friendly technology
  • Silent operation
  • Doesn’t require demolishing existing walls or ceilings
  • 16 feet installation kit included – copper tube, wall sleeve, drain hose, etc.


Specifications of MRCOOL DIY 18K BTU 20 SEER Heat Pump & AC

Brand, Capacity, Performance & Ratings
Outdoor Model Number DIY-18-HP-C-230B
Indoor Model Number DIY-18-HP-WMAH-230B
Type Mini Split System
Duct Ductless
Heat Pump & Air Handler Series E Star DIY Series
Generation Third Generation
HVAC Operation Both Heating & Air Conditioning
Heating Capacity (BTU) 18000 BTU
Cooling Capacity (BTU) 18000 BTU
SEER Rating 20 SEER
Area Coverage Up to 750 square feet
Refrigerant Type R-410A
Electrical Data
Voltage 208 – 230V
Frequency 60 Hz
Phase 1
Min. Circuit (Disconnect) 15
Max. Fuse (Breaker) 20
Dimension, Size & Weight
Indoor Unit Dimension 42.52” x 8.90” x 13.19”
Outdoor Unit Dimension 33.27” x 14.29” x 27.64”
Liquid Piping Size 1/4 inch
Gas Piping Size 1/2 inch
Indoor Unit Net Weight 30.2 lbs
Indoor Unit Gross Weight 54.01 lbs
Outdoor Unit Net Weight 98.77 lbs
Outdoor Unit Gross Weight 122.36 lbs
National Average Annual Operating Costs
Heating Cost $381
Cooling Cost $119



Warranty –

  • Compressor warranty: 7 years
  • Parts warranty: 5 years


N.B: For better comfort and longevity, it is advised that the unit is installed and maintained by a licensed HVAC professional.

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