MRCOOL DIY Mini Split – 21,000 BTU 2 Zone Ductless Air Conditioner and Heat Pump with 25 ft. and 35 ft. Install Kit, DIYM218HPW01C08
$3,339.00 Original price was: $3,339.00.$3,059.00Current price is: $3,059.00.
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Introducing the 4th Generation MRCOOL Mini Split, designed to efficiently cool and heat two distinct spaces. The comprehensive package includes: a DIY 18,000 BTU Multi-Zone Condenser, one 9,000 BTU Wall-Mounted Air Handler, one 12,000 BTU Wall-Mounted Air Handler, two remotes, and installation kits measuring 25 ft. and 35 ft. The remarkable advantage is that installation can be completed by you, without the need for professional assistance!
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 25ft 1/4 x 1/2 Lineset for DIY 9K, 12K & 18K Indoor, SKU: DIY25-1412
- MRCOOL DIY 35ft 1/4 x 1/2 Lineset for DIY 9K, 12K & 18K Indoor, 4th Generation, SKU: DIY35-1412C
Please note that when all air handlers operate simultaneously, their total BTU output must not exceed the condenser’s BTU rating. Consequently, the maximum combined BTU output of the air handlers will never surpass the 18K BTU capacity of the condenser.
Condenser
- Energy Efficiency: This 2-Zone condenser, when used with selected MRCOOL air handlers, achieves an impressive efficiency rating of 21 SEER.
- Versatile Operation: Capable of heating even in temperatures as low as 5°F.
- Lifetime Warranty: For your peace of mind, this is the only condenser available with a limited lifetime compressor warranty. Simply register in the MRCOOL Care Program to secure this lifetime warranty!
Air Handler, 9K BTU, Quantity 1
- Extensive Coverage: This air handler can service areas up to 375 sq. ft.
- Multiple Operating Modes: It offers incredible versatility with several operating modes, including COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
- Smart Control: This unit can be conveniently controlled via your Apple or Android smartphone using the Smart HVAC app.
- Simple Installation: Thanks to its lightweight and compact design, installation is straightforward on most interior walls with the provided mounting plate.
Air Handler, 12K BTU, Quantity 1
- Extensive Coverage: This air handler can service areas up to 500 sq. ft.
- Multiple Operating Modes: It offers incredible versatility with several operating modes, including COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
- Smart Control: This unit can be conveniently controlled via your Apple or Android smartphone using the Smart HVAC app.
- Simple Installation: Thanks to its lightweight and compact design, installation is straightforward on most interior walls with the provided mounting plate.
Line Set 25 ft., Quantity 1
- This 25 ft. copper line set connects the MRCOOL Condenser to the MRCOOL Air Handlers. For Multi-Zone systems, a separate line set is required for each indoor unit to ensure optimal functionality.
- Pre-Charged: These line sets come pre-charged with the precise amount of R-410A refrigerant.
- Cost-Effective Installation: This allows you to perform the installation without hiring a certified technician, saving you money!
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 ensure optimal functionality.
- Pre-Charged: These line sets come pre-charged with the precise amount of R-410A refrigerant.
- Cost-Effective Installation: This allows you to perform the installation without hiring a certified technician, saving you money!
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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 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 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 Modes Auto – auto selects from Cool, Heat or Fan-Only
Dry – dehumidify
Cool
Heat
Fan Only
Quiet
SleepLine Set Length 25 Feet Liquid Line Size 1/4″ Suction Line Size 1/2″ Line Set Length 35 Feet Liquid Line Size 1/4″ Suction Line Size 1/2″ -
Coverage Area
When selecting an air conditioning or heating unit, it’s crucial to match the BTU output with the square footage of the area you intend to cool or heat. Our coverage chart simplifies this process, ensuring optimal performance and energy efficiency for your space.
Categorized List:
- 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
Factors such as insulation quality, ceiling height, and the presence of appliances can influence performance. For personalized guidance, feel free to reach out to our knowledgeable 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.

























