MRCOOL DIY Mini Split – 21,000 BTU 2 Zone Ceiling Cassette Ductless Air Conditioner and Heat Pump, DIY-BC-218HP0912
$4,482.00 Original price was: $4,482.00.$3,735.00Current price is: $3,735.00.
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The 4th Generation MRCOOL Mini Split is an efficient and versatile DIY system, ideal for multi-zone cooling and heating. This package includes an 18,000 BTU multi-zone condenser, one 9,000 BTU ceiling cassette air handler, one 12,000 BTU ceiling cassette air handler, and two remotes. Designed for easy installation, it ensures that the combined BTU output of the air handlers will not exceed the condenser’s 18,000 BTU capacity.
Package Includes
- MRCOOL DIY Multi-Zone 2-Zone 18K BTU Condenser, 4th Gen Series (DIY-MULTI2-18HP230C)
- MRCOOL DIY Series 9K BTU Ceiling Cassette (DIYCASSETTE09HP-230C25)
- MRCOOL DIY Series 12K BTU Ceiling Cassette (DIYCASSETTE12HP-230C25)
- Two Remotes
Condenser Features
- Energy Efficiency: Achieves a 21 SEER efficiency rating when paired with select MRCOOL air handlers.
- Performance in Extreme Conditions: Operates efficiently even at temperatures as low as -13°F.
- Lifetime Warranty: Includes a limited lifetime compressor warranty upon registration in the MRCOOL Care Program.
Air Handler – 9K BTU (Quantity: 1)
- Coverage Area: Effective for spaces up to 375 sq. ft.
- Versatile Operating Modes: Includes COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
- Design: Low profile installation for unobtrusive heating and cooling.
- Installation: Fits easily between all types of joists on 16″ centers, including pre-manufactured I-joists.
- Maintenance: Easy air filter access with the Elevation function on the remote controller.
Air Handler – 12K BTU (Quantity: 1)
- Coverage Area: Effective for spaces up to 500 sq. ft.
- Versatile Operating Modes: Includes COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
- Design: Low profile installation for unobtrusive heating and cooling.
- Installation: Fits easily between all types of joists on 16″ centers, including pre-manufactured I-joists.
- Maintenance: Easy air filter access with the Elevation function on the remote controller.
Note: Linesets are not included in this package. Please ensure to add them separately.
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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 5F ~ 122F Heat Mode – Outdoor Operating Temperature Range -13F ~ 75.2F SEER 21 EER 12.5 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 Modes Auto – Auto selects from Cool, Heat or Fan-Only
Dry – dehumidify
Cool
Heat
Fan Only
Quiet
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 Modes Auto – Auto selects from Cool, Heat or Fan-Only
Dry – dehumidify
Cool
Heat
Fan Only
Quiet
Sleep -
Coverage Area
To determine the appropriate BTU rating for cooling or heating an area, refer to the following coverage chart. Note that additional factors such as insulation, ceiling height, and the number of appliances in the room may impact performance. For further assistance, please contact our Sales Team.
Coverage Chart
- 180-375 sq. ft.:Â 9,000 BTUs
- 376-500 sq. ft.:Â 12,000 BTUs
- 501-750 sq. ft.:Â 18,000 BTUs
- 751-1,000 sq. ft.:Â 24,000 BTUs
- 1,001-1,500 sq. ft.:Â 36,000 BTUs
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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.





















