MR Cool DIY 4th Gen 2-Zone Condensor Unit, 18,000BTU Heat & Cool

MR Cool DIY 4th Gen 2-Zone Condensor Unit, 18,000BTU Heat & Cool

The DIY-MULTI2-18HP230C MRCOOL® DIY 4th Gen 2-Zone Condenser is a high-efficiency, homeowner-friendly mini-split system designed to deliver 18,000 BTU of cooling and heating power across two zones—without requiring a professional installation crew. Featuring DIY Quick Connect pre-charged line sets, this unit allows you to install it yourself using basic tools, while still delivering up to 21 SEER efficiency and reliable performance even in extreme temperatures. It’s built tough with a Gold Fin® corrosion-resistant coating and backed by a limited lifetime compressor warranty—because comfort shouldn’t come with a complicated install or constant maintenance headaches.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: DIY-MULTI2-18HP230C
• Brand / Series: MRCOOL® DIY 4th Gen Multi-Zone
• Product Type: 2-zone ductless mini-split condenser (heat pump)
• Cooling Capacity: 18,000 BTU
• Heating Capacity: 19,000 BTU
• Zone Capacity: 2 zones
• Efficiency Ratings:
  • Up to 21 SEER / 21.2 SEER2
  • EER: 12.5
  • HSPF-4: 10.6
  • HSPF-5: 8.6
• Voltage: 208–230V (Single Phase, 60 Hz)
• Inverter Technology: DC inverter for energy-efficient operation
• Refrigerant: R-410A (pre-charged system)
• Installation: DIY Quick Connect system with pre-charged line sets (no HVAC license required)
• Line Set Compatibility: 1/4", 1/2" & 3/8", 5/8" (adapter included for 24K air handler)
• Max Line Set Length: 123 ft total
• Operating Range:
  • Cooling: 5°F to 122°F
  • Heating: -13°F to 75.2°F
• Compressor Type: Twin rotary
• Airflow: 1764.71 CFM
• Sound Level: 59 dBA
• Condenser Coating: Gold Fin® corrosion-resistant coating
• Smart Features: WiFi & app compatibility (iOS & Android)
• Breaker Requirements: Max fuse 25A / Min circuit ampacity 18A
• Dimensions (Net): 35.04" W x 13.46" D x 26.50" H
• Weight (Net): 100.53 lbs
• Warranty:
  • 5-year parts
  • 7-year compressor
  • Limited lifetime compressor warranty (with registration)

Ideal For

• Homes needing multi-room heating and cooling with one outdoor unit
• DIY homeowners wanting to install their own HVAC system
• Garages, additions, shops, or offices needing efficient climate control
• Users in climates with extreme temperatures (down to -13°F heating)
• Anyone who wants professional-level comfort without paying for professional installation—because saving money and staying comfortable is a pretty good combo