MRCOOL DIY Mini Split – 21,000 BTU 2 Zone Ceiling Cassette Ductless Air Conditioner and Heat Pump with 50 ft. Install Kit, DIYM218HPC01C22
$6,190.00 Original price was: $6,190.00.$4,761.00Current price is: $4,761.00.
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Introducing the 4th Generation MRCOOL DIY Mini Split, a comprehensive solution designed to efficiently cool and heat your home, office, or any other space. This complete package includes: an 18K BTU Multi-Zone Condenser, 9K and 12K BTU Ceiling Cassette Air Handlers, a remote control, and the necessary lineset and communication wire for each air handler. One of the standout features of this system is its DIY installation capability, allowing you to set it up effortlessly without the need for costly HVAC professionals or specialized equipment.
Mini Split System Includes:
- MRCOOL DIY Multi-Zone 2-Zone 18K BTU Condenser, 4th Gen Series, SKU: DIY-MULTI2-18HP230C
- MRCOOL DIY Series 9K BTU Ceiling Cassette, SKU: DIYCASSETTE09HP-230C25
- MRCOOL DIY Series 12K BTU Ceiling Cassette, SKU: DIYCASSETTE12HP-230C25
- MRCOOL 50ft 1/4 x 1/2 Pre-Charged Lineset for DIY 9K, 12K & 18K Indoor, 4th Generation, SKU: DIY50-1412C x 2
It is important to note that if all air handlers are operated simultaneously, their combined BTU output will not exceed the condenser’s BTU rating. Thus, the total BTU output of the Air Handlers will remain within the 18K BTU capacity of the Condenser.
Condenser 18K BTU:
- Energy Efficient:Â This 18K BTU condenser boasts an impressive 21.2 SEER2 efficiency rating, qualifying for significant energy savings and tax rebates.
- Works in Extreme Temperatures: Designed to heat even in temperatures as low as -13°F, ensuring reliable performance.
- Cool and Heat Worry-Free:Â The condenser is backed by a 7-year compressor warranty and a 5-year parts warranty. For lifetime coverage on the compressor, simply register in the MRCOOL Care Program.
Air Handler 9K BTU:
- Vast Coverage Area:Â This cassette effectively covers spaces ranging from 180 to 375 sq. ft.
- Versatile Operation:Â Equipped with multiple operating modes including COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP, providing flexibility for any environment.
- Out of Sight Design:Â The low-profile installation ensures discreet heating and cooling.
- Worry-Free Installation:Â Designed for easy installation between various types of joists on 16″ centers, including pre-manufactured I-joists.
- Easy Air Filter Access:Â The Elevation function allows the filter panel to lower for convenient maintenance.
Air Handler 12K BTU:
- Vast Coverage Area:Â This unit efficiently covers an area from 250 to 500 sq. ft.
- Versatile Operation:Â Like the 9K unit, it features multiple operating modes including COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
- Out of Sight Design:Â The low-profile installation ensures it blends seamlessly into your space.
- Worry-Free Installation:Â Simplifies the installation process between all types of joists on 16″ centers, including pre-manufactured I-joists.
- Easy Air Filter Access:Â The Elevation function allows for easy maintenance by lowering the filter panel.
Line Set:
- Pre-Charged:Â These line sets are pre-charged with the exact amount of R-410A refrigerant for optimal performance.
- DIY & Save Money:Â This feature enables a straightforward installation process, eliminating the need for a certified technician and helping you save on installation costs.
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Product Overview
 Covers 875 sq. ft.      Â
 DIY Installation
  Ceiling Mounted       Â
  Number of Zones: 2
 Voltage: 208 to 230     Â
 Outdoor Operating Temp (Cool): 5°F to 122°F
 Outdoor Operating Temp (Heat): 5°F to 75.2°F
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What's Included
Air Handler

Condenser

Line Set

Wall Sleeve

Communication Wire

Remote Control
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Specifications and Dimensions
Condenser Product Dimensions 35.04″W x 13.46″D x 26.50″H Cooling Capacity 18,000 BTU Heating Capacity 19,000 BTU Zone Capacity 2 Cool Mode – Outdoor Operating Temperature Range 5°F ~ 122°F Heat Mode – Outdoor Operating Temperature Range -13°F ~ 75.2°F SEER2 21.2 EER2 12.5 HSPF2 9.6 Voltage Requires a minimum of 208V-230V/60HZ/18-25A (please check your home meets this electrical requirement prior to purchase) Registered Warranty 7 Years Replacement on Condenser, 5 Years Parts Air Handler — 9K BT Product Dimensions 50.31″W x 13.19″D x 8.98″H Mount Type Ceiling Cassette Cooling Capacity 9,000 BTU Heating Capacity 9,000 BTU Registered Warranty 5 Years Parts Modes Auto (Auto selects Cool, Heat or Fan-Only)
Cool
Heat
Dry
Fan Only
SleepAir Handler — 12K BTU Product Dimensions 50.31″W x 13.19″D x 8.98″H Mount Type Ceiling Cassette Cooling Capacity 12,000 BTU Heating Capacity 12,000 BTU Registered Warranty 5 Years Parts Modes Auto (Auto selects Cool, Heat or Fan-Only)
Cool
Heat
Dry
Fan Only
SleepLine Set Length 50 Feet Liquid Line Size 1/4″ Suction Line Size 1/2″ -
Coverage Area
Looking to cool or heat a specific area but unsure about the required BTUs? Our coverage chart simplifies the process. For spaces ranging from 180 to 1,500 square feet, we offer a comprehensive breakdown:
- 180-375 Square Feet: 9K BTU
- 376-500 Square Feet: 12K BTU
- 501-750 Square Feet: 18K BTU
- 751-1,000 Square Feet: 24K BTU
- 1,001-1,500 Square Feet: 36K BTU
Remember, factors like insulation, ceiling height, and appliance count can affect performance. For personalized guidance, feel free to reach out to our Sales Team for assistance.
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Handling Line Sets
When installing your MRCOOL system, handle refrigerant lines carefully to ensure optimal performance and prevent damage.
Bending the Copper Lines: Maintain a minimum 4-inch bend radius and use smooth curves instead of sharp angles to protect the lines and ensure proper refrigerant flow.
Avoid Repeated Bending: Bending copper lines more than three times can harden and weaken them, increasing the risk of breakage. Handle with care and minimize adjustments.
For best results, use gradual bends and consult a licensed professional or our support team if needed.

























