MR Cool DIY 4th Gen. Mini-Split Unit, 18,000BTU, 750Sq Ft, 208/230V Consists of:

MR Cool DIY 4th Gen. Mini-Split Unit, 18,000BTU, 750Sq Ft, 208/230V

The MRCOOL® DIY-18-HP-WM-230C25 4th Gen Mini-Split System is a high-efficiency, mid-capacity comfort solution designed to heat and cool spaces up to 750 sq. ft. with professional performance—without needing professional installation. Delivering 18,000 BTU of heating and cooling power and boasting up to 22 SEER (22.7 SEER2) efficiency, this system combines strong performance with energy savings. With a pre-charged 25 ft Quick-Connect® line set, smart controls, and multiple operating modes, it’s built to make installation simple and comfort effortless.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: DIY-18-HP-WM-230C25
• Brand / Series: MRCOOL® DIY 4th Gen E Star
• Product Type: Ductless Mini-Split Heat Pump System (Single Zone)
• Cooling Capacity: 18,000 BTU
• Heating Capacity: 18,000 BTU
• Coverage Area: Up to 750 sq. ft.
• Efficiency Rating: Up to 22 SEER / 22.7 SEER2
• EER / EER2: 12.5 / 12.6
• HSPF Ratings: 11.5 (HSPF-4) / 9 (HSPF-5)
• Voltage: 208–230V, Single Phase, 60 Hz
• Minimum Circuit Ampacity: 18A
• Max Fuse / Breaker: 30A
• Refrigerant Type: R-410A
• Refrigerant Volume: 56.44 oz
• Line Set Included: 25 ft Pre-Charged Quick-Connect® line set
• Max Line Length: 75 ft
• Line Sizes: 1/4" (liquid) / 1/2" (suction)
• Compressor Type: Rotary DC inverter
• Airflow: Multi-speed (up to ~465 CFM) with 4-way air direction & oscillation
• Sound Level: 31 – 44.5 dBA (quiet operation)
• Operating Modes: Auto, Heat, Cool, Fan, Dry (dehumidify), Sleep
• Operating Range:
  • Cooling: -13°F to 122°F
  • Heating: -13°F to 75°F
• Coating: Gold Fin® corrosion-resistant condenser
• Controls:
  • Remote control included
  • SmartHVAC app (WiFi enabled)
  • Compatible with iOS & Android
• Special Features: Follow Me temperature sensing, Quiet Mode
• Certifications: Energy Star®, UL Listed, AHRI Certified
• Warranty: 5-year parts / 7-year compressor / Limited lifetime compressor (with registration)

Ideal For

• Medium-sized rooms, garages, workshops, and open living areas
• Homeowners wanting DIY installation with high efficiency
• Spaces needing reliable heating and cooling year-round
• Users who prefer smart control and energy savings
• Anyone who wants serious comfort without turning installation into a full HVAC project—or a call to three different contractors