MRCOOL DIY 4th Gen Mini Split - 4-Zone 48,000 BTU Ductless Cassette Air Conditioner and Heat Pump with 12K + 12K + 12K + 12K Cassette Air Handlers, 50 ft. Line Sets, and Install Kit

MRCOOL DIY 4th Gen Mini Split - 4-Zone 48,000 BTU Ductless Cassette Air Conditioner and Heat Pump with 12K + 12K + 12K + 12K Cassette Air Handlers, 50 ft. Line Sets, and Install Kit


Sale price$9,610.00 Regular price$12,599.00
Save 24%

Line Set Mix: 50 ft. + 50 ft. + 50 ft. + 50 ft.

Estimated delivery:
  • Secure Payment
    Amazon American Express Apple Pay Diners Club Discover Google Pay Mastercard PayPal Shop Pay Venmo Visa
    Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
  • Free Shipping*
  • 30-Day Return Policy⁺


MRCOOL DIY 4th Gen Mini Split - 4-Zone 48,000 BTU Ductless Cassette Air Conditioner and Heat Pump with 12K + 12K + 12K + 12K Cassette Air Handlers, 50 ft. Line Sets, and Install Kit

The MRCOOL 4th Gen Mini Split bundle includes everything you need to heat and cool up to four rooms. The easy installation, Do-It-Yourself

Bundle Includes:

  1. MRCOOL DIY 4th Gen 48K BTU, 5-Zone, 20.5 SEER, Ductless Heat Pump Condenser (DIY-MULTI5-48HP230C)

  2. MRCOOL DIY 4th Gen 12K BTU, 20.75 SEER, Ductless Mini-Splits Ceiling Cassette Air Handler (DIYCASSETTE12HP-230C25) (x4)

  3. Line Sets - length & quantity varies based on selection:

  • MRCOOL 16 Ft. 1/4-Inch x 1/2-Inch Lineset for DIY 9K, 12K & 18K Indoor (DIY16-1412)

  • MRCOOL DIY 4th Generation 50 Ft. 1/4-Inch x 1/2-Inch Lineset for DIY 9K, 12K, & 18K Indoor (DIY50-1412C)

  • MRCOOL DIY 4th Generation DIYCOUPLER-14 + DIYCOUPLER-12 + 75 Ft. MC-5 Cable (DIYCOUPLER-1412K75C)

MRCOOL 4th Gen Heat Pump Condenser

  • Power - 48K BTUs
  • Zones - Cool and heat up to five rooms in your home
  • SEER - SEER efficiency rating of up to 20.5
  • Durable - Constructed to hold up against the weather and resist corrosion with its durable Gold Fin Condenser coating. Performs in weather conditions down to 5°F
  • Easy DIY Installation - Easy to install and no technician required. Includes everything to easily Do-It-Yourself
  • Environmentally Friendly - R-410A environmentally friendly refrigerant
  • Warranty - Standard 7-year compressor/5-year parts warranty; register for limited lifetime compressor warranty

    MRCOOL Wall Mount Air Handler - 12K BTU - Quantity 4

    • Modes - Choose from COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
    • Smartphone Control - Control with your Apple or Android smartphone through the use of the Smart HVAC app
    • Easy DIY Installation - With its light and compact design, it can be installed easily on most interior walls with the included mounting plate

      MRCOOL Line Sets

      • The MRCOOL copper line set is required to connect the Condenser to each Air Handler.
      • Environmentally Friendly - Line sets come pre-charged with R-410A refrigerant, the safest form of refrigerant.
      • Length Options - Select which combination of lengths you require for your installation needs.
      • Need more length? Use a coupler to connect two lines together



      16.14" D x 31.89" H x 37.24" W


      208-230 V



      Cooling Capacity

      36 BTU

      Heating Capacity

      36K BTU

      Min-Max Ambient Cool

      5F ~ 122F

      Min-Max Ambient Heat

      13F ~ 75.2F

      Refrigerant Type


      Max Line Set Length

      196.85 ft TOTAL


      12K Air Handler

      Product Dimensions

      13.19 in D x 8.98 in H x 50.31 in W


      208-230 V

      Cooling Capacity

      12K BTU

      Heating Capacity

      12K BTU


      • Quiet
      • Sleep
      • Auto Cool
      • Fan Only Option


      Line Sets


      16 ft., 25 ft., 35 ft., or 50 ft.

      Liquid Line Size


      Suction Line Size



      • Connect 50 ft. line set to 16 ft. or 25 ft. line set
      • For 24K or 36K Air Handler: DIYCOUPLER-3858K75C
      • For 9K, 12K, or 18K Air Handler: DIYCOUPLER-1412K75C

      Restricted States


       Proposition 65 Warning


      What BTU rating should I choose for my air handler?

      • This depends on the coverage area/room size you are trying to heat/cool
      • An Air Handler's BTU is how powerful the fan is. A higher BTU rating will be able to heat/cool a larger area
      Air Handler BTU Coverage Area/Room Size (Sq Ft.)*
      9K BTU
      Up to 375 Sq. ft
      12K BTU Up to 500 Sq. ft
      18K BTU Up to 750 Sq. ft
      24k BTU Up to 1000 Sq. ft
      36k BTU  Up to 1500 Sq. ft

      *Ceiling height, insulation, and local climate may impact the coverage area. For example, an uninsulated room will require more power than a well insulated room.

      Shipping & Returns

      *Shipping Policy

      • Shipping is Free
      • Large appliances ship via Freight Curbside shipment. Meaning the carrier will drop off your item on your property not inside your home. The courier company will call ahead of time to schedule a drop off date
      • For the full details, visit our Shipping Page

      Return/Refund Policy
      • 30-Day Return Policy
      • If your order arrives damaged, we will exchange you for a new one. Damage must be reported within 24 hours. 
      • For more details, visit our Return Policy Page


      Customer Reviews

      Based on 23 reviews
      WesD (Chicago, US)
      Installed and working great

      Installed with ceiling cassettes... Quiet and keeping us cool so far !

      Thomas R. (Bradford, US)

      I had purchase a 2 zone/ 2 head unit.

      Installed to manufacture specs and instructions.

      One machine lasted 30 days before an internal fan motor- bearing broke and caused product failure.

      A week after that, the interior -second head unit failed. Completely iced up internally.

      I put a complaint in as soon as each issue presented itself.

      I have yet to receive compensation, a replacement part or acknowledgement of the second unit failing.

      I do not recommend Mr. Cool products to anyone. They are cheaply made and the customer support is extremely poor.

      Not worth DIY savings (pre charged units)

      Nat R. (Odessa, US)
      4 ton condensing unit

      Very good delivery service installed and works like a Should

      walter w. (Port Neches, US)
      Old r22 unit, same capacity, worked better in temperature extremes

      Product came packaged well, undamaged. Installation was difficult, followed instructions for suction line above coil on bilevel installation with coil above condenser. 108 inside house on startup, 103 ambient. First start, high pressure 500, low pressure 170, supply air temp 66 degrees. Very worried at first, but after house cooed down, everything within parameters. Researched 410a refrigerant, found out it looses efficiency exponentially during temperature extremes. My old r22 unit would supply 54 degree supply air in comparable operating conditions. EPA, government, a/c manufactures all lying to American public

      justin N. (New York, US)
      Well built

      First time ever installing Mr cool unit was built very good it has a dc converted fan motor,came with a salt shelf type coating om inside of unit over all very impressed 5star system

      Why buy a MRCOOL from Home Outlet Direct?

      - We are an authorized MRCOOL dealer

      - Industry leading sales and customer service

      - Thousands of happy customers

      Real Customers. Real Results.

      Recently viewed

      You may also like