MRCOOL DIY Mini Split – 21,000 BTU 2 Zone Ductless Air Conditioner and Heat Pump with 35 ft. and 50 ft. Install Kit, DIYM218HPW01C15
$4,099.00 Original price was: $4,099.00.$3,339.00Current price is: $3,339.00.
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This 4th Generation MRCOOL Mini Split System is designed to efficiently cool and heat two separate rooms, providing you with an all-in-one solution for your climate control needs. The package includes a DIY 18,000 BTU Multi-Zone Condenser, a 9,000 BTU Wall Mounted Air Handler, a 12,000 BTU Wall Mounted Air Handler, two remote controls, and installation kits of 35 ft. and 50 ft. The remarkable advantage of this system is that it allows for self-installation!
Package Includes
- MRCOOL DIY Multi-Zone 2-Zone Condenser, 4th Gen Series, SKU: DIY-MULTI2-18HP230C
- MRCOOL DIY 4th Generation 9K BTU Wall Mount Air Handler 230 Volt with Enhanced WiFi, SKU: DIY-09-HP-WMAH-230C25
- MRCOOL DIY 4th Generation 12K BTU Wall Mount Air Handler 230 Volt with Enhanced WiFi, SKU: DIY-12-HP-WMAH-230C25
- MRCOOL DIY 35ft 1/4 x 1/2 Lineset for DIY 9K, 12K & 18K Indoor, 4th Generation, SKU: DIY35-1412C
- MRCOOL DIY 50ft 1/4 x 1/2 Lineset for DIY 9K, 12K & 18K Indoor, 4th Generation, SKU: DIY50-1412C
It is essential to note that when all air handlers operate simultaneously, their total BTU output will not surpass the BTU rating of the condenser. Therefore, the combined BTU output of the air handlers will always remain below the 18K BTU rating of the condenser.
Condenser
- Energy Efficient: This 2-Zone condenser, when paired with selected MRCOOL air handlers, boasts an outstanding efficiency rating of up to 21 SEER.
- Works In All Environments: Capable of heating even in temperatures as low as 5°F.
- Lifetime Warranty: For your assurance, this is the only condenser available that offers a limited lifetime compressor warranty. Simply enroll in the MRCOOL Care Program to secure this warranty!
Air Handler, 9K BTU, Quantity: 1
- Large Coverage Area: This air handler effectively covers an area of up to 375 sq. ft.
- Versatile: It features multiple operating modes, including COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP, making it exceptionally adaptable.
- Easy to Control: The unit can also be conveniently controlled via your Apple or Android smartphone using the Smart HVAC app.
- Convenient Installation: Its lightweight and compact design allows for easy installation on most interior walls using the provided mounting plate.
Air Handler, 12K BTU, Quantity: 1
- Large Coverage Area: This air handler covers an area of up to 500 sq. ft.
- Versatile: It includes multiple operating modes—COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP—ensuring flexibility in its use.
- Easy to Control: Like the 9K unit, this air handler can be controlled through the Smart HVAC app on your Apple or Android smartphone.
- Convenient Installation: Its light and compact design facilitates straightforward installation on most interior walls with the included mounting plate.
Line Set 35 ft., Quantity: 1
- This 35 ft. copper line set connects the MRCOOL DIY Condenser to the MRCOOL DIY Air Handlers. For Multi-Zone systems, a separate line set is required for each indoor unit to guarantee proper functionality.
- Pre-Charged: Each line set comes pre-charged with the exact amount of R-410A refrigerant.
- DIY & Save Money: This feature allows for a do-it-yourself installation, eliminating the need for a certified technician, thereby reducing costs!
Line Set 50 ft., Quantity: 1
- This 50 ft. copper line set connects the 4th Generation MRCOOL DIY Condenser to the MRCOOL DIY Air Handlers (9K, 12K, and 18K).
- Pre-Charged: These line sets are also pre-charged with the precise amount of R-410A refrigerant.
- DIY & Save Money: Similar to the 35 ft. line set, this option allows for installation without the assistance of a certified technician, offering additional savings!
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Product Overview
 Covers 875 sq. ft.      Â
 DIY Installation
 Wall 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 Specifications 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 Min Ambient Cool 5F ~ 122F Min Ambient Heat -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 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 — 12K BTU Product Dimensions 31.57″W x 7.44″D x 11.69″H Mount Type Wall Cooling Capacity 12,000 BTU Heating Capacity 12,000 BTU Registered Warranty 5 Years Parts Modes Auto – auto selects from Cool, Heat or Fan-Only
Dry – dehumidify
Cool
Heat
Fan Only
Quiet
SleepLine Set Length 35 Feet Liquid Line Size 1/4″ Suction Line Size 1/2″ Line Set Length 50 Feet Liquid Line Size 1/4″ Suction Line Size 1/2″ -
Coverage Area
When selecting the appropriate cooling or heating unit for your space, it’s essential to consider the area’s square footage and other pertinent factors. Our coverage chart provides a straightforward reference for determining the required BTUs 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
It’s important to note that additional elements such as insulation, ceiling height, and the presence of appliances can influence 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.

























