MRCOOL | DIY Mini-Split 4th Gen - 36,000 BTU 3 Zone Ductless Air Conditioner and Heat Pump Complete System

Air Handler Combinations ?

AH #1 + #2 + #3:


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Total Price


Use code "WINTER2023" for 5% OFF STOREWIDE + 1x *FREE Bladeless Fan with every complete system purchased. 

*Fan's model is based on availability and stock.

Free Shipping

All orders are shipped free of charge and are not subject to *sales tax. (*Except Washington state)

Best Warranty In The Industry!

Standard 7-year compressor and 5-year parts warranty. Register for limited lifetime compressor warranty.

Easy DIY Installation

Pre-charged linesets allow you to install this innovative ductless system without professional experience


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For information regarding Processing & Shipping time, please refer to the shipping page

Key Terms: OD = Outdoor Unit (Condenser) AH = Indoor Unit (Air Handler)

The MRCOOL DIY Mini-Split 4th Gen Multi Zone Ductless Air Conditioner and Heat Pump Complete System is a versatile and efficient way to cool and heat your home.

With this system, you can easily and affordably control the temperature in multiple rooms or zones of your home without the need for bulky and expensive ductwork

This system allows you to control the temperature in multiple zones independently, so you can set different temperatures in different areas of your home or business.

This can be especially useful if you have rooms or areas that are used differently or at different times of the day.

Some of the key features and benefits of this product include:

Easy installation: The MRCOOL DIY Mini-Split 4th Gen Multi Zone Ductless Air Conditioner and Heat Pump Complete System is designed to be easily installed by homeowners with its simple do-it-yourself installation process.

You no longer need to pay for an expensive professional installation service as it comes with everything you need to get started, including an outdoor unit that is connected to indoor units via small, flexible refrigerant lines, allowing for independent temperature and airflow control for each indoor unit and an easy-to-follow instruction manual.

Energy-efficient performance: The System features a high-efficiency compressor and is designed to be energy-efficient, helping you save money on your energy bills. 

Boasting an impressive up to 22 SEER efficiency rating.

Wide cooling and heating range: The MRCOOL DIY Mini-Split 4th Gen Multi Zone Ductless Air Conditioner and Heat Pump Complete System is available in a range of sizes, with the largest units capable of providing up to 48,000 BTUs of cooling or heating power.

Also, you can choose varieties of Pre-Charged Quick Connect Line Set lengths from 16Ft, 25Ft, 35Ft and up to 50Ft, which makes connecting refrigerant piping as simple as turning a few wrenches.

Need longer lengths? You can buy line sets and couplers here.

Modern design: It has a sleek, modern design that will look great in any home. 

The outdoor unit is small and compact, making installation a breeze without taking up a lot of space. And the indoor unit's sleek and stylish design lets it blend into any room.

Quiet operation: The system operates quietly, so you can enjoy a comfortable environment without any noise disturbance making it suitable for use in bedrooms, living rooms, and other areas where noise might be a concern.

Numerous operating modes: It can COOL, HEAT, AUTO, DRY (dehumidify), SLEEP and more to keep your home comfortable year round.

Remote control: It also comes with a remote control, allowing you to easily adjust the temperature and settings from anywhere in the room.

Operate your Mini Split from your phone: It gives users total control over their comfort level – no matter if your space is big or small you can have the perfect climate at your fingertips by just installing the Smart HVAC app with your IOS or Android smartphone.

Limited Lifetime Compressor Warranty: Lastly, the MRCOOL DIY Mini-Split 4th Gen Single-Zone system on the market offers a limited lifetime compressor warranty giving you peace of mind that your investment is protected.

Air Handler Coverage

Air Handler Coverage

  • 9K covers 375 sq. ft.
  • 12K covers 550 sq. ft.
  • 18K covers 800 sq. ft.
  • 24K covers 1050 sq. ft.
  • 36K covers 1550 sq. ft.

If all indoor units (air handlers) run simultaneously, their combined BTU output will not exceed the BTU rating of the outdoor unit (condenser)

DIY 3-Zone Includes

  • 1
  • 2
  • 3
  • 4
  • 5

36K BTU Condenser


Wall Mounted Air Handlers (x3)


Remote Controls (x3)


Line Sets (x3)

Gold Fin® condenser

Corrosion resistant - live on the coast? Don't worry, our condenser is built to resist long-term corrosion.

Energy Efficient

DC Inverter technology consumes less energy and efficiently maintains energy costs.


R-410A environmentally friendly refrigerant.

SmartHVAC app + WIFI

Control your DIY anywhere with your Apple or Android smart device and an Internet connection.

Smart Control

Compatible with Amazon Alexa and Google Assistant.

DIY Pro Cable Included

Includes the new DIY Pro™ Cable, an added safety feature to protect the wiring from the outside elements.


Watch the quick overview below:

Customer Reviews