MRCOOL DIY Mini Split – 21,000 BTU 2 Zone Ceiling Cassette Ductless Air Conditioner and Heat Pump with 35 ft. Install Kit, DIYM218HPC01C13
$6,225.00 Original price was: $6,225.00.$4,611.00Current price is: $4,611.00.
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This 4th Generation MRCOOL DIY Mini Split system encompasses everything necessary to effectively cool and heat various environments, including your home or office. The package includes an 18K BTU Multi-Zone Condenser, 9K and 12K BTU Ceiling Cassette Air Handlers, a remote control, and the required lineset and communication wire for each air handler. A standout feature of this system is its ease of installation, allowing you to set it up without the need for a costly HVAC technician 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 35ft 1/4 x 1/2 Pre-Charged Lineset for DIY 9K, 12K & 18K Indoor, 4th Generation, SKU: DIY35-1412C x 2
It is important to note that when all air handlers operate simultaneously, their cumulative BTU output will not exceed the condenser’s BTU rating. Specifically, the combined output of the air handlers will always stay within the 18K BTU capacity of the condenser.
Condenser 18K BTU
- Energy Efficient: This 18K BTU condenser achieves an impressive SEER2 efficiency rating of 21.2, making it eligible for significant savings through energy or tax rebates.
- Operates in Extreme Temperatures: The unit is designed to provide heating even when outdoor temperatures plunge to -13°F.
- Peace of Mind: The condenser is backed by a 7-year warranty on the compressor and a 5-year warranty on parts. For lifetime coverage on the compressor, simply enroll in the MRCOOL Care Program.
Air Handler 9K BTU
- Expansive Coverage Area: The cassette effectively services spaces ranging from 180 to 375 square feet.
- Versatile Functionality: This unit offers multiple operational modes, including COOL, HEAT, AUTO, DRY (dehumidification), and SLEEP.
- Discreet Design: The low-profile installation allows for unobtrusive heating and cooling.
- Hassle-Free Installation: It can be easily mounted between various joists spaced at 16 inches apart, including pre-manufactured I-joists.
- Convenient Air Filter Access: By using the Elevation function, the filter panel can be lowered for straightforward air filter maintenance.
Air Handler 12K BTU
- Extensive Coverage Area: This cassette caters to areas between 250 and 500 square feet.
- Versatile Functionality: Like its counterpart, it offers multiple operating modes, including COOL, HEAT, AUTO, DRY (dehumidification), and SLEEP.
- Discreet Design: The low-profile installation is ideal for hidden heating and cooling solutions.
- Hassle-Free Installation: It can be easily mounted between all types of joists spaced at 16 inches apart, including pre-manufactured I-joists.
- Convenient Air Filter Access: The Elevation function allows the filter panel to lower for easy maintenance of the air filter.
Line Set
- Pre-Charged: These line sets come pre-charged with the exact amount of R-410A refrigerant.
- Cost-Effective DIY Solution: This feature enables installation without hiring a certified technician, ultimately saving you money.
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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 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 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.

























