MRCOOL DIY 5th Gen Mini Split - 4-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 18K + 18K + 12K + 12K Ceiling Cassette Air Handlers

MRCOOL DIY 5th Gen Mini Split - 4-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 18K + 18K + 12K + 12K Ceiling Cassette Air Handlers

SKU: DIY5-4ZC-55HP-18K18K12K12K

Sale price$9,531.00 Regular price$12,795.00


Air Handler Type: Ceiling

Choose Line Set Lengths:

18K Air Handler Line Set:

18K Air Handler Line Set:

12K Air Handler Line Set:

12K Air Handler Line Set:


In Stock Estimated delivery: Jul 13th-22nd
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Package Overview

Take control of your home’s comfort with the MRCOOL® 5th Gen DIY® Multi-Zone Mini Split System — the ultimate solution for efficient, customizable, and true DIY-friendly heating and cooling.

This powerful 55K 4-Zone system includes two 18K and two 12K ceiling cassette air handlers.

Features

  • Customize mini-split system: choose the perfect line set length for each zone just above the “Add to Cart” button.
  • Ultra-Efficient Cooling & Heating: Enjoy up to 22 SEER2 and 10.6 HSPF2-4 for energy-efficient year-round comfort.
  • Low-Profile Ceiling Cassette Design: Flush-mounted unit fits between standard ceiling joists for a clean, built-in look.
  • DIY-Friendly QuickConnect® Installation: No vacuuming or professional tools needed — pre-charged line sets make setup fast and simple.
  • Smart Voice & App Control: Full control via SmartHVAC app, Alexa, Google Assistant, or included wireless remote.
  • Eco-Conscious Refrigerant: Uses R-454B refrigerant with a low environmental impact.
  • Industry-Leading Warranty: Includes 5-year parts, 7-year compressor, and lifetime replacement with MRCOOL® Care registration.

Package Includes:

Description
Product Specs
Manuals & Guides

Our new 5th Generation MRCOOL® DIY® 55k BTU Multi-Zone Ductless Mini-Split Condenser is one of the most efficient and innovative units in the industry, and we’re excited to finally share it with you! On top of saving time and money because you won’t need an HVAC professional, this system will give you a good sense of accomplishment because you’ll have installed it yourself! The whole family will be able to enjoy the comfort of this condenser, because it can heat and cool up to 6 different spaces that equal up to 2290 sq. ft., giving you the ability to heat and cool an entire home to your exact specifications using a single MRCOOL® system.

The system’s patented pre-charged Quick-Connect® line sets essentially fast-forward the installation of this system, enabling you to skip the evacuation and charging steps and simplifying the entire process. We utilize new R-454B refrigerant in these line sets, which is a much more environmentally friendly and efficient choice. Features like these assist this unit in achieving its impressive SEER2 of 22, and its HSPF2-4 of 10.6, both of which signify that this system will help you save money throughout the entire time you use it. Once you install this condenser, you’ll be met with a variety of features to help you control your comfort.

One of these features is the Smart HVAC app, available on Apple and Android, that allows you to operate your system from the convenience of your phone. Set schedules, manage different modes, monitor energy consumption, and more all without having to leave the couch! You can also set up voice control through Amazon Alexa or Google Home, meaning you can control your comfort without moving a finger. This system ensures you’ll be enjoying ultimate convenience and superior comfort. The warranty for this unit is one of the best in the industry, and we’re proud to have your back. You can enjoy the peace of mind of a 5 year parts warranty, a 7 year compressor warranty, and, once you enroll in the MRCOOL® Care Program, a Limited Lifetime Replacement warranty. If you need perfect comfort but don’t want to break the bank, this MRCOOL® DIY® condenser is your answer!

Features

  • Intertek listed 5031495
  • Easy DIY installation
  • Future-proof your investment with the included DIYPro® cable, eliminating the need for electrical conduit.
  • Keep the included remote close by, and MRCOOL DIY®'s Follow Me® function will track the air temperature around you to ensure maximum comfort.
  • The MRCOOL® Smart HVAC Controller® Module and App fully support Google Assistant & Amazon Alexa out of the box.
DIMENSIONS & WEIGHT
Dimensions 16.34" D x 52.48" H x 37.48" W
GENERAL INFORMATION
Color White
Inverter DC
Quiet Mode Yes
Contans Chemicals Yes
CAPACITY & PERFORMANCE
SEER2 22
EER2 12
HSPF2-4 10.6
HSPF2-5 8.5
Tonnage 4.6
Cooling Capacity (BTU) 47000
Heating Capacity (BTU) 55000
Cycle 60
Zone Capacity 6
COMPRESSOR & MOTORS
Compressor Motor Type Rotary
NOISE LEVELS
Decibel Rating (DBA) 64
ELECTRICAL REQUIREMENTS
Voltage (V) 208/230
Phase 1
Max Fuse Breaker (A) 45
Min Circuit Ampacity (A) 43
REFRIGERANT & PIPING
Refrigerant Type R-454B
Refrigerant Volume (OZ) 151.68
Line Set Length 25
Max Lineset Length (FT) 221.4
Liquid LIne Size 1/4
Suctio Line Size (3/8 X4) (1/2 X2)
FILTER & HEATING
Auxiliary Heater Included No
Auxiliary Heater Available No
CONTROLS & CONNECTIVITY
Fan Only Option Yes
Auto Cool Yes
WIFI Compatibility Yes
APP Compatibility Yes
Works with IOS Yes
Works with Android Yes
SAFETY
UL Listed Yes
ETL Listed Yes
Energy Star Certified Yes
AHRI Certified Yes
Has Batteries Yes
Contains Electronics Yes
Contains Aerosol Yes
Contains Compressed Gas Yes
Proposition 65 Warning Yes
WARRANTY
Registered Warranty Extended Limited Lifetime*
Base Parts Warranty 5
Base Compressor Warranty 7
Description
Product Specs
Manuals & Guides

The 5th Generation MRCOOL® DIY® Series OuttaSight® 18K BTU 230V One-Way Ceiling Cassette provides efficient and powerful climate control for areas up to 800 sq. ft.

Designed for effortless installation, it eliminates the need for specialized tools, offering a cost-effective and straightforward setup. Ideal for both multi-zone and single-zone applications, this unit fits seamlessly between 16” ceiling joists, including pre-manufactured I-joists, ensuring a flush, modern appearance. Unlike conventional ceiling cassettes that require extensive ductwork or valuable wall space, this system provides flexible installation, making it perfect for both new construction and retrofit projects. It connects effortlessly to the MRCOOL® DIY® Quick Connect® line set, pre-charged with R-454B, an eco-friendly refrigerant, eliminating the need for vacuuming and simplifying the installation process.

Advanced filtration improves indoor air quality, while the Elevation function allows the filter panel to lower for easy maintenance and cleaning. With whisper-quiet operation and multiple control options—including a wireless remote, SmartHVAC app, and compatibility with Amazon Alexa and Google Assistant—this system ensures customized comfort. Supported by an industry-leading warranty, including a limited lifetime warranty, a 7-year compressor warranty, and a 5-year parts warranty, the MRCOOL® Outtasight® Ceiling Cassette offers reliable performance and year-round comfort.

DIMENSIONS & WEIGHT
Dimensions 13.19" D x 8.98" H x 50.31" W
Net Weight (Lbs) 45
Gross Weight (Lbs) 88
GENERAL INFORMATION
Mount Type Ceiling
Color White
Max Coverage Area 800
Air Flow Direction 1-Way
Quiet Mode Yes
CAPACITY & PERFORMANCE
CFM 400 / 352 / 300 / 207 / 207
Cooling Capacity (BTU) 18,800
Heating Capacity (BTU) 22,700
Cycle 60
COMPRESSOR & MOTORS
Blower Motor RPM 1344/1184/1024
NOISE LEVELS
Decibel Rating (DBA) 41.5
Decibel Rating Low (DBA) 26
Decibel Rating High (DBA) 44
ELECTRICAL REQUIREMENTS
Voltage (V) 208-230
Phase 1
Max Fuse Breaker (A) 15
Min Circuit Ampacity (A) 3
Rated Load 1.2
REFRIGERANT & PIPING
Refrigerant Type R-454B
Liquid Line Size 1/4
Suction Line Size 1/2
FILTER & HEATING
Filter Type Reusable
CONTROLS & CONNECTIVITY
Fan Only Option Yes
Sleep Mode Yes
Auto Cool Yes
WIFI Compatibility Yes
APP Compatibility Yes
Works with IOS Yes
Works with Android Yes
Remote Control Included Yes
SAFETY
Has Batteries Yes
Contains Electronics Yes
Contains Chemicals Yes
Contains Aerosol Yes
Contains Compressed Gas Yes
Proposition 65 Warning Yes
Restricted States GU;PR;VI
WARRANTY
Registered Warranty Limited Lifetime Compressor
Base Warranty 5-Year Part/7-Year Compressor
Bas Parts Warranty 5 Years
Registered Compressor Warranty Limited Lifetime Compressor
Base Compressor Warranty 7 Years
Description
Product Specs
Manuals & Guides

The 5th Generation MRCOOL® DIY® Series OuttaSight® 12K BTU 230V One-Way Ceiling Cassette is a sleek, efficient, and space-saving climate solution for areas up to 550 sq. ft. Engineered for easy installation, it seamlessly integrates into multi-zone systems, making it ideal for both new constructions and retrofit projects without requiring ductwork or wall space.

Designed for discreet placement, this cassette mounts flush between 16” ceiling joists, including pre-manufactured I-joists, providing a clean, modern appearance while maximizing room layout flexibility. It connects effortlessly to the MRCOOL® DIY® Quick Connect® line set, which comes pre-charged with R-454B, a more environmentally friendly refrigerant, eliminating the need for vacuuming and reducing installation time. With advanced filtration technology, this unit enhances indoor air quality, while the Elevation function lowers the filter panel for easy maintenance and cleaning. It operates quietly, ensuring a comfortable and peaceful environment in any room.

The cassette is fully controllable through a wireless remote, SmartHVAC app, and voice commands via Amazon Alexa and Google Assistant, giving you ultimate convenience and customization. Backed by an industry-leading warranty, including a limited lifetime warranty, a 7-year compressor warranty, and a 5-year parts warranty, this system offers long-term dependability and year-round comfort.

Features

  • Low Profile Installation
  • Fits between 16" Ceiling Joists
  • Works with Multi and Single Zone Systems
  • Two-Stage DC motor
  • Quiet Operation
  • Multiple Operating Modes
  • Remote Included
  • Advanced Filtration
  • Swing Technology
DIMENSIONS & WEIGHT
Dimensions 13.19" D x 8.98" H x 50.31" W
Net Weight (Lbs) 45
Gross Weight (Lbs) 88
GENERAL INFORMATION
Mount Type Ceiling
Color White
Max Coverage Area 550
Air Flow Direction 1-Way
Quiet Mode Yes
CAPACITY & PERFORMANCE
CFM 353 / 312 / 283 / 247 / 177
Cycle 60
COMPRESSOR & MOTORS
Blower Motor RPM 1075/982/797
NOISE LEVELS
Decibel Rating (DBA) 37
Decibel Rating Low (DBA) 24
Decibel Rating High (DBA) 41
ELECTRICAL REQUIREMENTS
Voltage (V) 208-230
Phase 1
Max Fuse Breaker (A) 15
Min Circuit Ampacity (A) 3
Rated Load 1
REFRIGERANT & PIPING
Refrigerant Type R-454B
Liquid Line Size 1/4
Suction Line Size 3/8
FILTER & HEATING
Filter Type Reusable
CONTROLS & CONNECTIVITY
Fan Only Option Yes
Sleep Mode Yes
Auto Cool Yes
WIFI Compatibility Yes
APP Compatibility Yes
Works with IOS Yes
Works with Android Yes
Remote Control Included Yes
SAFETY
Has Batteries Yes
Contains Electronics Yes
Contains Chemicals Yes
Contains Aerosol Yes
Contains Compressed Gas Yes
Proposition 65 Warning Yes
Restricted States GU;PR;VI
WARRANTY
Registered Warranty Limited Lifetime Compressor
Base Warranty 5-Year Part/7-Year Compressor
Bas Parts Warranty 5 Years
Registered Compressor Warranty Limited Lifetime Compressor
Base Compressor Warranty 7 Years
Description
Product Specs
Manuals & Guides

This remote is included with each air handler in MRCOOL's 5th Generation DIY or Advantage Mini Split Systems.

DIMENSIONS & WEIGHT
Dimensions 2" W x 6" L x 1" H
GENERAL INFORMATION
Color White
CONTROLS & CONNECTIVITY
Works with MRCOOL DIY 5th Generation Mini Splits
SAFETY
Restricted States GU;PR;VI

Mini Split FAQ

 

What BTU rating should I choose for my air handler?

  • This depends on the coverage area/room size you are trying to heat/cool
  • An Air Handler's BTU is how powerful the fan is. A higher BTU rating will be able to heat/cool a larger area
Air Handler BTU Coverage Area/Room Size (Sq. Ft.)*
6K
Up to 200 Sq. Ft.
9K
Up to 375 Sq. Ft.
12K Up to 500 Sq. Ft.
18K Up to 750 Sq. Ft.
24k Up to 1,000 Sq. Ft.
36k Up to 1,500 Sq. Ft.

 

*Ceiling height, insulation, and local climate may impact the coverage area. For example, an uninsulated room will require more power than a well insulated room.

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