MRCOOL DIY Mini Split – 54,000 BTU 4 Zone Ductless Air Conditioner and Heat Pump, DIY-B-448HP09091818
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Introducing the cutting-edge 4th Generation MRCOOL Mini Split, featuring a DIY 48,000 BTU Multi-Zone Condenser accompanied by two 9,000 BTU Wall Mounted Air Handlers and two 18,000 BTU Wall Mounted Air Handlers, all inclusive of four Remotes. The standout feature of this system is its user-friendly installation, allowing you to set it up effortlessly on your own.
Included in this comprehensive package are the following items:
- MRCOOL DIY Multi Zone 5-Zone 48K BTU Condenser, 4th Gen Series, SKU: DIY-MULTI5-48HP230C
- MRCOOL DIY 4th Generation 9K BTU Wall Mount Air Handler 230 Volt with Enhanced WiFi, SKU: DIY-09-HP-WMAH-230C25 (x2)
- MRCOOL DIY 4th Generation 18K BTU Wall Mount Air Handler 230 Volt with Enhanced WiFi, SKU: DIY-18-HP-WMAH-230C25 (x2)
Please note that line sets are not included in this package; ensure to add them separately.
In the event that all air handlers operate concurrently, their combined BTU output will not surpass the BTU rating of the condenser.
Condenser:
- Energy Efficient: This 5 Zone condenser, when paired with select MRCOOL air handlers, boasts an impressive 20.5 SEER efficiency rating.
- Adaptability: Capable of sustaining heating performance even at temperatures as low as 5°F.
- Lifetime Warranty: Offering unparalleled peace of mind, this condenser comes with a limited lifetime compressor warranty, making it the only one on the market with such an offer. Simply register into the MRCOOL Care Program to avail yourself of the lifetime warranty.
Air Handler, 9K BTU, Quantity 2:
- Expansive Coverage: Each handler covers an area of up to 375 sq. ft.
- Versatility: Equipped with multiple operating modes including COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
- Smart Control: Compatible with Apple or Android smartphones via the Smart HVAC app for seamless control.
- Easy Installation: Its lightweight and compact design facilitates easy installation on most interior walls using the provided mounting plate.
Air Handler, 18K BTU, Quantity 2:
- Extensive Coverage: Each handler covers an area of up to 750 sq. ft.
- Versatility: Equipped with multiple operating modes including COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
- Smart Control: Compatible with Apple or Android smartphones via the Smart HVAC app for seamless control.
- Easy Installation: Its lightweight and compact design facilitates easy installation on most interior walls using the provided mounting plate.
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Product Overview
 Covers 2250 sq. ft.      Â
 DIY Installation
 Wall Mounted         Â
  Number of Zones: 4
 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 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 9K BTU Product Dimensions 31.57″W x 7.44″D x 11.69″H Mount Type Wall Cooling Capacity 9,000 BTU Heating Capacity 9,000 BTU Registered Warranty 5 Years Parts Modes Auto – auto selects from Cool, Heat or Fan-Only
Dry – dehumidify
Cool
Heat
Fan Only
Quiet
SleepAir Handler 18K BTU Product Dimensions 42.52″W x 8.90″D x 13.19″H Mount Type Wall 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.





















