MRCOOL DIY Mini-Split Series 4th Generation 36,000 BTU 3-Zone Wall Mounted 12K+12K+18K Heat Pump System

MRCOOL SKU: DIY-MULTI4-36HP230C,2xDIY-12-HP-WMAH-230C25,DIY-18-HP-WMAH-230C25,3xDIY25-1412

MRCOOL DIY Mini-Split Series 4th Generation 36,000 BTU 3-Zone Wall Mounted 12K+12K+18K Heat Pump System

  • Delivers up to 21.5 cooling and 11 heating efficiency.
  • Includes a 36000 BTU outdoor unit, three wall-mounted indoor units, three wireless remote controls, and three 25' pre-charged linesets.
  • Designed to heat and cool three separate rooms up to 550 sq. ft., 550 sq. ft., and 1,000 sq. ft.
  • Pre-charged linesets allow customers to install this ductless system without special tools, equipment, or training.

Save $869.60
MRCOOLSKU: DIY-MULTI4-36HP230C,2xDIY-12-HP-WMAH-230C25,DIY-18-HP-WMAH-230C25,3xDIY25-1412

Ready to Ship - Average Delivery Time of 1.85 Days
Retail price:
Sale price$4,744.00 USD Regular price$5,613.60 USD


The MRCOOL DIY mini-split system is the only whole-home mini-split solution a customer can install themselves. This tri-zone heat pump system can handle extreme ambient temperatures from 5° for cooling and -13° for heating. Both outdoor and indoor units come pre-charged with R-410A refrigerant. Each wall-mounted indoor unit also comes with a wireless remote control and a 25' lineset.


  • Gold Fin® condenser to resist long term corrosion
  • DIYPro™ cable eliminates the need for an electrical conduit providing higher mechanical protection and durability
  • Remote with Follow Me® functionality to track air temperature more accurately and ensure maximum comfort
  • Prevents damage to the compressor with leakage detection
  • Auto restart after a power outage
  • Supports Google Assistant and Amazon Alexa out of the box
  • Smartphone app to control the system from anywhere with an Apple or Android device and an internet connection

HVAC professionals selected these components to maximize their performance and efficiency.

This unit’s AHRI Certified Reference Number is 207339194.


This system comes with a 5-year parts, 7-year compressor, and 1-year remote warranty when registered with the manufacturer.


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