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Pre-Order the new 5th Gen Series!

MRCOOL DIY Mini Split - 39,000 BTU 3 Zone Ductless Air Conditioner and Heat Pump with 25 ft. Install Kit, DIY348HP09121825

4.8 25 reviews
Model: DIY348HP09121825
$7,354.20
$7,354.20 $8,171.33
-10%
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Mount type: Wall
Line set length: 25 ft.

Need different line set lengths?
Configure your system here!

Pre-Order Now! Estimated Shipping: June 2025. Be the first to own the brand-new 5th Gen Series.

$7,354.20
$7,354.20 $8,171.33

Product Overview

  • Zones: 3

  • DIY Installation

  • Pre-Charged Line Sets

  • Voltage: 208-230V

  • Outdoor Operating Temp (Cool): 5°F to 122°F

  • Outdoor Operating Temp (Heat): 5°F to 75.2°F

What's Included

  • MRCOOL DIY Multi Zone 5-Zone 48K BTU Condenser, 4th Gen Series, DIY-MULTI5-48HP230C MRCOOL DIY Multi Zone 5-Zone 48K BTU Condenser, 4th Gen Series, DIY-MULTI5-48HP230C

    48K BTU Condenser

    Quantity: 1
    Model: DIY-MULTI5-48HP230C
  • MRCOOL DIY 4th Generation 9K BTU Wall Mount Air Handler with Enhanced WiFi (208V-230V/60HZ/3-15A), DIY-09-HP-WMAH-230C25 MRCOOL DIY 4th Generation 9K BTU Wall Mount Air Handler with Enhanced WiFi (208V-230V/60HZ/3-15A), DIY-09-HP-WMAH-230C25

    9K BTU Air Handler

    Quantity: 1
    Model: DIY-09-HP-WMAH-230C25
  • MRCOOL DIY 4th Generation 12K BTU Wall Mount Air Handler 230 Volt with Enhanced WiFi, DIY-12-HP-WMAH-230C25 MRCOOL DIY 4th Generation 12K BTU Wall Mount Air Handler 230 Volt with Enhanced WiFi, DIY-12-HP-WMAH-230C25

    12K BTU Air Handler

    Quantity: 1
    Model: DIY-12-HP-WMAH-230C25
  • MRCOOL DIY 4th Generation 18K BTU Wall Mount Air Handler 230 Volt with Enhanced WiFi, DIY-18-HP-WMAH-230C25 MRCOOL DIY 4th Generation 18K BTU Wall Mount Air Handler 230 Volt with Enhanced WiFi, DIY-18-HP-WMAH-230C25

    18K BTU Air Handler

    Quantity: 1
    Model: DIY-18-HP-WMAH-230C25
  • MRCOOL 25ft 1/4 x 1/2 Pre-Charged Lineset for DIY 9K, 12K & 18K Indoor, DIY25-1412 MRCOOL 25ft 1/4 x 1/2 Pre-Charged Lineset for DIY 9K, 12K & 18K Indoor, DIY25-1412

    25 ft. 1/4 x 1/2 Line Set

    Quantity: 3
    Model: DIY25-1412

System also includes Communication Wires, Drain Hose Pipes, Wall Sleeves, Remote Controls and Wifi Dongles.

Better Together

System Details

DESCRIPTION

This 4th Generation MRCOOL Mini Split includes everything you need to cool and heat three different rooms. You'll be sent: DIY 48,000 BTU Multi-Zone Condenser, one 9,000 BTU Wall Mounted Air Handler, one 12,000 BTU Wall Mounted Air Handler, one 18,000 BTU Wall Mounted Air Handler, three Remotes and three 25 ft. Installation Kits. The best part about all of this is that you can install it yourself!
Package Includes

Condenser

  • Energy Efficient. This 5 Zone condenser, when paired with select MRCOOL air handlers, is capable of producing an impressive 20.5 SEER efficiency rating.
  • Works In All Environments. The capability to continue to deliver heating performance when temperatures reach 5°F
  • Lifetime Warranty. For added peace of mind, this is the only condenser on the market that comes with a limited lifetime compressor warranty. Simply register into the MRCOOL Care Program to get the lifetime warranty!

    Air Handler, 9K BTU, Quantity 1

    • Large Coverage Area. Handler covers an area up to 375 sq. ft.
    • Versatile. Incredibly versatile and equipped with multiple operating modes, which include COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
    • Easy to Control. This unit also has the capability to be controlled by your Apple or Android smartphone through the use of the Smart HVAC app.
    • Convenient Installation. With its light and compact design, it can be installed easily to most interior walls with the included mounting plate.

    Air Handler, 12K BTU, Quantity 1

    • Large Coverage Area. Handler covers an area up to 500 sq. ft.
    • Versatile. Incredibly versatile and equipped with multiple operating modes, which include COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
    • Easy to Control. This unit also has the capability to be controlled by your Apple or Android smartphone through the use of the Smart HVAC app.
    • Convenient Installation. With its light and compact design, it can be installed easily to most interior walls with the included mounting plate.

    Air Handler, 18K BTU, Quantity 1

    • Large Coverage Area. Handler covers an area up to 750 sq. ft.
    • Versatile. Incredibly versatile and equipped with multiple operating modes, which include COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
    • Easy to Control. This unit also has the capability to be controlled by your Apple or Android smartphone through the use of the Smart HVAC app.
    • Convenient Installation. With its light and compact design, it can be installed easily to most interior walls with the included mounting plate.

    Line Set 25 ft., Quantity 3

    • This 25 ft. copper line set connects the MRCOOL Condenser to the MR COOL Air Handlers. For Multi-Zone systems, one line set per indoor unit is required to ensure the system will function properly.
    • Pre-Charged. These line sets come pre-charged with the precise amount of R-410A refrigerant.
    • DIY & Save Money. This means the installation process can be performed without retaining the services of a certified technician - thus saving you money!

          ELECTRICAL REQUIREMENTS

          • Model: DIY-MULTI5-48HP230C
          • Type: 48K BTU Condenser
          • BTU: 48,000 BTU
          • Power Supply: 208-230V/60 Hz/1ph
          • Minimum Circuit (Disconnect): 40.0 A
          • Maximum Fuse (Breaker): 60.0 A

          SPECIFICATIONS & 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
          • Min Ambient Cool: 5F ~ 122F
          • Min Ambient Heat: 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 Compressor, 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 // Sleep
          • Air 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 // Sleep
          • Air 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 // Sleep
          • Line Set
          • Length: 25 Feet
          • Liquid Line Size: 1/4"
          • Suction Line Size: 1/2"

          WHAT'S INCLUDED

          • 1 x 48K BTU Condenser
          • 1 x 9K BTU Air Handler
          • 1 x 12K BTU Air Handler
          • 1 x 18K BTU Air Handler
          • 3 x 25 ft. 1/4 x 1/2 Line Set

          INSTALLATION & GUIDES

          COVERAGE AREA

          Please refer to this coverage chart to determine how many BTUs are required for the area you would like to cool or heat.

          BTU  Square Feet
          9,000 BTU 180 - 375 Sq Ft.
          12,000 BTU 376 - 500 Sq Ft.
          18,000 BTU 501 - 750 Sq Ft.
          24,000 BTU 751 - 1,000 Sq Ft.
          36,000 BTU 1,001 - 1,500 Sq Ft.

          Some additional factors may impact performance such as insulation, ceiling height and the number of appliances in the room. For assistance, contact our Product Experts.

          SHIPPING POLICY

          Free Curbside Delivery
          MRCOOL orders include free curbside delivery via FedEx Ground, FedEx Freight, or the most trusted carrier available. Please note that delivery is to the curbside only - be sure to arrange for assistance if needed, as the carrier will not bring items inside your home.

          Tracking & Delivery Scheduling
          In most cases, you will receive tracking details 3-5 business days after you place your order. When the tracking number is sent, please allow 1-2 business days for the tracking number to populate details.

          See our full Shipping Policy here.

          RETURN POLICY

          MRCOOL returns must be requested within 30 days of your delivery date. We are unable to process returns submitted after this period. Products must be unused, uninstalled, and in their original packaging, including the box and pallet, to qualify for a return.

          Please note, a 35% restocking fee will be applied to all approved returns.

          See our full Return Policy here.

          Looking for a different size?

          Use our custom builder to find your perfect mini split system.

          Build Your System

          Accessories
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          Customer Reviews

          Based on 25 reviews
          84%
          (21)
          12%
          (3)
          0%
          (0)
          4%
          (1)
          0%
          (0)
          D
          Debralee Chowning
          "Mr Cool Mini Split: Unmatched Comfort and Efficiency!"

          I recently purchased the Mr Cool Mini Split System, and I'm thrilled with its performance! Premium Home Source was excellent with communication and delivery. The installation was a breeze, and the system quickly transformed my space into a comfortable oasis. The sleek design and quiet operation exceeded my expectations. It's energy-efficient and provides precise temperature control. I highly recommend the Mr Cool Mini Split for anyone looking for a reliable and efficient heating/cooling solution.

          User picture
          L
          Lyndy Little
          The order/delivery process

          Premium Home Source coordinated our purchase and delivery perfectly.

          J
          James Reyes
          Mrcool 3 purchases

          This the 3rd time I purchased a Mrcool system from Premium Home Source for my wood shop, my daughter's house and my house. No problems with the purchase as well as the DIY installation.

          G
          Guy Patton
          Just installed this morning!

          The unit was turned on for the 1st time and boy it was so quiet I literally had to make sure the fan was spinning outside. the unit and air handlers cool very quickly. I also tested the heating it worked superb. I wont be using this until summer time gets here honestly. that's my main purpose for purchasing it. Living in the deep south requires good A/C. Premium Home Source customer service is also top notch. I would recommend anyone to give them a try. THEY ROCK!

          E
          Emma Brewer
          Best $ spent in a long time

          Best $ spent in a long time. Super easy install even for this 62 y.o. female. Had to have grandsons lift the units up in place but if you can read you can install this yourself. If I could change anything I would make a simpler remote with an on/off, temp up / down button and mode. I won't be using the sleep or other features the unit offers and those buttons are just cluttering up the remote. The overall system works fantastic though - couldn't be happier with the cooling - and the system is very VERY quiet

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