MRCOOL DIY Mini Split – 54,000 BTU 3 Zone Ceiling Cassette Ductless Air Conditioner and Heat Pump, DIY-BC-348HP181818
$8,950.00 Original price was: $8,950.00.$6,411.00Current price is: $6,411.00.
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This 4th Generation MRCOOL Mini Split system features a DIY 48,000 BTU Multi-Zone Condenser, three 18,000 BTU Ceiling Cassette Air Handlers, and three Remotes. The standout feature of this system is its ease of installation, allowing for a DIY setup.
Package Includes:
- MRCOOL DIY Multi Zone 5-Zone 48K BTU Condenser, 4th Gen Series (DIY-MULTI5-48HP230C)
- MRCOOL DIY Series 18K BTU Ceiling Cassette (DIY-CASSETTE18HP-230C25) x3
Note: This system does not include line sets. Make sure to add them to your order!
When all air handlers are operated simultaneously, their combined BTU output will not exceed the condenser’s BTU rating, ensuring optimal performance within the 48K BTU limit.
Condenser Features:
- Energy Efficient:Â This 5-Zone condenser, when paired with select MRCOOL air handlers, achieves an impressive 20.5 SEER efficiency rating.
- All-Weather Performance: Capable of delivering heating performance even when temperatures drop to 5°F.
- Lifetime Warranty:Â For added peace of mind, this is the only condenser on the market that includes a limited lifetime compressor warranty. Simply register with the MRCOOL Care Program to obtain the lifetime warranty.
Air Handler, 18K BTU (Quantity: 3):
- Large Coverage Area:Â Each handler covers an area up to 750 sq. ft.
- Versatile:Â Equipped with multiple operating modes, including COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
- Discreet Design:Â Features a low-profile installation for unobtrusive heating and cooling.
- Worry-Free Installation:Â Easily installed between all types of joists on 16″ centers, including pre-manufactured I-joists.
- Easy Air Filter Access:Â By activating the Elevation function on the remote controller (or smart controller), the filter panel lowers for easy air filter maintenance.
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Product Overview
 Covers 2250 sq. ft.      Â
 DIY Installation
  Ceiling Mounted       Â
  Number of Zones: 3
 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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Specifications and Dimensions
Condenser Specifications Product Dimensions 37.48″W x 16.34″D x 52.48″H Cooling Capacity 48,000 BTU Heating Capacity 48,000 BTU Zone Capacity 5 Cool Mode – Outdoor Operating Temperature Range 5F ~ 122F Heat Mode – Outdoor Operating Temperature Range 5F ~ 75.2F SEER 20.5 EER 11 Voltage Requires a minimum of 208V-230V/60HZ/40-60A (please check your home meets this electrical requirement prior to purchase) Registered Warranty 7 Years Replacement on Condenser, 5 Years Parts Air Handler 18K BTU Product Dimensions 50.31″W x 13.19″D x 8.98″H Mount Type Ceiling Cassette Cooling Capacity 18,000 BTU Heating Capacity 18,000 BTU Registered Warranty 5 Years Parts Modes Auto – Auto selects from Cool, Heat or Fan-Only
Dry – dehumidify
Cool
Heat
Fan Only
Quiet
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Coverage Area
When considering the purchase of our cooling or heating system, it’s essential to determine the appropriate BTU output based on the square footage of your space. Please refer to the following coverage chart for guidance:
- 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 additional factors, such as insulation quality, ceiling height, and the presence of appliances, can influence performance. For personalized assistance in selecting the optimal solution for your needs, don’t hesitate to reach out to our experienced 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.



















