MRCOOL DIY Mini Split – 21,000 BTU 2 Zone Ceiling Cassette Ductless Air Conditioner and Heat Pump with 16 and 35 ft. Install Kit, DIYM218HPC01C02
$5,692.00 Original price was: $5,692.00.$4,378.00Current price is: $4,378.00.
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Introducing the 4th Generation MRCOOL DIY Mini Split, your all-in-one solution for efficient cooling and heating in residential or commercial spaces. This comprehensive package includes an 18K BTU Multi-Zone Condenser, along with 9K and 12K BTU Ceiling Cassette Air Handlers, a remote control, linesets, and communication wires for each air handler. What sets this system apart is its self-installation capability, allowing you to set it up with ease without the need for costly HVAC technicians 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 16ft 1/4 x 1/2 Pre-Charged Lineset for DIY 9K, 12K & 18K Indoor, SKU: DIY16-1412
- MRCOOL 35ft 1/4 x 1/2 Pre-Charged Lineset for DIY 9K, 12K & 18K Indoor, 4th Generation, SKU: DIY35-1412C
It is important to note that when all air handlers operate simultaneously, their total BTU output must not exceed the BTU rating of the condenser. In this configuration, the combined output of the air handlers will remain below the 18K BTU capacity of the condenser.
18K BTU Condenser
- Energy Efficient: The 18K BTU condenser achieves an impressive efficiency rating of 21.2 SEER2, making it eligible for substantial energy savings and tax rebates.
- Works in Extreme Temperatures: This unit is designed to provide heating even when outdoor temperatures plummet to -13°F.
- Cool and Heat Worry-Free: Enjoy peace of mind with a 7-year compressor warranty and a 5-year parts warranty. For lifetime compressor coverage, simply enroll in the MRCOOL Care Program.
9K BTU Air Handler
- Vast Coverage Area: This cassette unit is capable of heating or cooling spaces ranging from 180 to 375 sq. ft.
- Versatile Operation: Featuring multiple modes of operation, including COOL, HEAT, AUTO, DRY (dehumidification), and SLEEP, this unit offers exceptional adaptability.
- Out-of-Sight Design: Its low-profile installation ensures that heating and cooling are discreetly integrated into your space.
- Worry-Free Installation: Designed for easy installation between various joist types on 16″ centers, including pre-manufactured I-joists.
- Easy Air Filter Access: The Elevation function allows the filter panel to lower for hassle-free air filter maintenance.
12K BTU Air Handler
- Vast Coverage Area: This cassette unit can effectively cover an area between 250 to 500 sq. ft.
- Versatile Operation: Similar to the 9K unit, it is equipped with multiple operating modes, including COOL, HEAT, AUTO, DRY (dehumidification), and SLEEP.
- Out-of-Sight Design: This unit’s low-profile installation allows for discreet heating and cooling.
- Worry-Free Installation: Installation is simple, accommodating various joist types on 16″ centers, including pre-manufactured I-joists.
- Easy Air Filter Access: The Elevation function allows for easy maintenance of the air filter by lowering the filter panel.
Line Set
- Pre-Charged: These line sets are pre-charged with the exact amount of R-410A refrigerant, simplifying the installation process.
- DIY & Save Money: This pre-charged feature enables you to install the system without the need for a certified technician, leading to significant cost savings.
Elevate your indoor climate control experience with the MRCOOL DIY Mini Split system, expertly designed for your convenience and comfort.
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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 requirement prior to purchase) Registered Warranty 7 Years Replacement on Condenser, 5 Years Parts Air Handler — 9K BTU 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 — 16 Feet Length 16 Feet Liquid Line Size 1/4″ Suction Line Size 1/2″ Line Set — 35 Feet Length 35 Feet Liquid Line Size 1/4″ Suction Line Size 1/2″ -
Coverage Area
When considering the cooling or heating requirements for your space, it’s essential to refer to our coverage chart to determine the appropriate number of BTUs needed. Here’s a breakdown based on square footage:
- Square Feet: 180-375 | BTU = 9K
- Square Feet: 376-500 | BTU = 12K
- Square Feet: 501-750 | BTU = 18K
- Square Feet: 751-1,000 | BTU = 24K
- Square Feet: 1,001-1,500 | BTU = 36K
Keep in mind that various factors, such as insulation, ceiling height, and the presence of appliances, can impact performance. For personalized assistance, feel free to reach out to our Sales Team.
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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.

























