MR Cool DIY 4th Gen. Mini-Split Unit, 12,000BTU, 500Sq Ft Consists of:

MR Cool DIY 4th Gen. Mini-Split Unit, 12,000BTU, 500Sq Ft

The MRCOOL® DIY12HP 4th Generation Mini-Split System is a compact, energy-efficient heating and cooling solution designed to deliver year-round comfort in smaller spaces—without the hassle of traditional HVAC installation. With 12,000 BTU capacity and coverage up to 500 sq ft, this system combines DIY-friendly installation, smart controls, and quiet operation into one clean package. Featuring pre-charged Quick Connect® lines and app-based control, it’s built for homeowners who want comfort without turning installation into a full-blown project.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: DIY12HP (Includes DIY-12-HP-C-115C25 condenser & DIY-12-HP-WMAH-115C25 air handler)
• Brand / Series: MRCOOL® DIY® 4th Generation
• Product Type: Ductless mini-split heat pump system
• Cooling Capacity: 12,000 BTU
• Heating Capacity: 12,000 BTU
• Coverage Area: Up to 500 sq ft
• Voltage: 208–230V / 1 Phase / 60Hz
• Efficiency: Up to 22 SEER (when paired system is installed)
• Refrigerant: R-410A (pre-charged Quick Connect® line set compatible)
• Installation: DIY-friendly with pre-charged lines—no vacuuming required
• Mount Type: Wall-mounted air handler
• Noise Level: Ultra-quiet operation (as low as 25 dBA)
• Compressor: Inverter-driven for efficiency and consistent temperature control
• Modes: Cool, Heat, Auto, Dry (dehumidify), Sleep, Fan Only
• Airflow Control: Multiple fan speeds (1050 / 850 / 650 RPM)
• Smart Features:
  • WiFi enabled with SmartHVAC app
  • Works with iOS & Android
  • Compatible with Alexa & Google Assistant
• Included Components:
  • Indoor air handler
  • Outdoor condenser
  • Remote control
  • Wall mounting plate
  • DIY Pro™ cable
• Line Set Compatibility: Designed for MRCOOL® pre-charged Quick Connect® lines
• Certifications: Energy Star® and AHRI certified
• Warranty:
  • 5-year parts warranty
  • 7-year compressor warranty
  • Limited lifetime compressor warranty (with registration)

Ideal For

• Heating and cooling bedrooms, offices, garages, and small living spaces
• Homeowners wanting a true DIY HVAC solution without specialized tools
• Spaces where quiet operation and energy efficiency are important
• Upgrading from window units to a more permanent, efficient system
• Anyone who wants comfort control from their phone… instead of walking across the room to adjust it