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It's the tiny house

MRCOOL Ductless Mini-Split Air Conditioner & Heat Pump


The MRCOOL DIY Series A/C and heat pump is a well built, super quiet, yet powerful ductless mini-split that is made specifically with the do-it-yourselfer in mind. This 4-in-1 ductless mini split is not just a wall mounted A/C unit. It also functions as a Heater, Dehumidifier and Fan for a customized level of comfort for your taste.

Our customers typically complete the installation of the system within 2-3 hours. This is the perfect system to cool and heat your Tiny Home, Cabin, Man Cave, Garage, and other smaller spaces. If you want great air comfort without paying an arm and a leg for installation, you want an easy-to-use MRCOOL DIY Series ductless heat pump.

 The MRCOOL DIY 12K is ideal for heating, cooling and dehumidifying spaces up to 500 square feet.   Save the hassle and expense of hiring expensive HVAC technicians for the installation. 

MrCool DIY 12K BTU Heat Pump Condenser
(Outdoor Unit):  DIY-12-HP-C-115A 
MrCool DIY 12K BTU Wall Mount Air Handler
(Indoor Unit):  DIY-12-HP-WMAH-115A
25' Pre-charged Line Set
1 Remote Control
Wifi Connector For Smart Phone
Owners Manual
Warranty Document

The MRCOOL DIY 18K is ideal for heating, cooling and dehumidifying spaces up to 750 square feet. Save money on installation with this easy do-it-yourself ductless mini-split system.

MrCool DIY 18K BTU Heat Pump Condenser
(Outdoor Unit):  DIY-18-HP-230A 
MrCool DIY 18K BTU Wall Mount Air Handler
(Indoor Unit):  DIY-18-HP-WMAH-230A
25' Pre-charged Line Set
1 Remote Control
WiFi Connector For Smartphone
Owners Manual
Warranty Document


  • Easy DIY Installation: No special tools, equipment or training required to install this super quiet ductless mini split which includes a 25′ pre-charged lineset
  • Personalized Performance: Achieve ideal personalized comfort by keeping the remote near by and MRCOOL Premier will monitor the temperature around you and make adjustments to suit your needs
  • Low Ambient Cooling: Cooling down to 5°F. This feature makes the MRCOOL DIY the ideal system for server rooms, greenhouses, and any other application that requires cooling all year.
  • Auto Restart: Power outages are no fun, especially when you live in a Tiny House. But don't worry, the MRCOOL DIY 12k (or 18K) auto restart will have the unit running again as soon as the power is restored

  • Corrosion Resistant Condenser: Live on the coast? Durability to withstand changing weather conditions, our condenser is built to resist long term corrosion.
  • Wifi Smart Control App: Control your MRCOOL DIY anywhere with your Apple or Android smart device and an internet connection.
  • Automated Low Coolant Alert: When the MRCOOL DIY detects low coolant an alarm will sound to alert you to the problem. This will prevent damage to the compressor while you maintain high air comfort.
  • Sleep Mode 24-Hour Comfort: We made Sleep Mode easy to program to save money, and let you sleep a little easier.
  • Louver Position Memory: Remembers So You Don’t Have To. Horizontal louver will automatically move to the same position as you set last time the unit was turned on.


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