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MRCOOL DIY 4th Gen Multi-Zone 4-Zone 48,000 BTU 21 SEER (9K + 9K + 18K + 18K) Ductless Mini-Split Air Conditioner and Heat Pump - 230V/60Hz, DIYM448HPW07C00

by Mr Cool
Sold out
Original price $6,900.00
Original price $6,900.00 - Original price $6,900.00
Original price $6,900.00
Current price $5,966.00
$5,966.00 - $5,966.00
Current price $5,966.00

Free Shipping. No Sales Tax (besides NY).

MRCOOL DIY Multi-Zone 4th Generation 48K BTU Four Zone Ductless Mini Split - A Heating and AC System You Can Install By Yourself!

Heat or cool four rooms with the MRCOOL DIY Multi-Zone 48,000 BTU 21 SEER 4 Zone Ductless Heat Pump Split System - 9K + 9K + 18K + 18K. This DIY Series multi-zone product features easy installation that requires no special tools or training. You'll save thousands of dollars on installation and you can get the amazing air comfort of your dreams due to the condenser’s 48,000 BTU capacity. This units consists of two 9,000 btu air handlers (350 square feet) and two 18,000 btu air handlers (550 square feet). A heat pump by design, this ductless HVAC solution can run in reverse and pull in heat from the outdoors when in a heating mode. It comes with a 7 year compressor warranty, (Plus a limited lifetime compressor warranty), 5 year parts manufacturer warranty! 

MRCOOL DIY 4th Gen Multizone 48,000 BTU systems can support up to FIVE indoor units.

The MRCOOL DIY Multi-Zone 48,000 BTU 21 SEER 4 Zone Ductless Heat Pump Split System - 9K + 9K + 18K + 18K units are super easy to install and require no special training or expensive specialty tools. The DIY system includes Quick Connect lines that are pre-charged with eco-friendly R-410A refrigerant. Due to the Quick Connect line set, you don’t have to hire an HVAC technician to complete the install. We also have simple video instructions on how to install a DIY Multi-Zone unit yourself!

The MRCOOL DIY Multi-Zone 48,000 BTU 21 SEER 4 Zone Ductless Heat Pump Split System - 9K + 9K + 18K + 18K can cool through the Summer, heat through the Winter, and dehumidify through the wet seasons. Plus, you can quickly check the temperature of each room in your home from the easy to read digital display or from the MRCOOL Smart Controller mobile app. The display on the front of each indoor air handler unit can also display troubleshooting codes and alerts, so you are always aware of any issues with your system. Operate each unit wirelessly with either the included remote or with the MRCOOL Smart Controller app for Apple or Android devices. You also have the ability to control your mini-split unit with Amazon Alexa or Google Home.

The four MRCOOL DIY Multi-Zone air handlers included in this set provide directional control of the heated or cooled air. This distributes the air evenly so everyone in the room can stay comfortable. If you are in a situation that requires forced cooling, you can set your MRCOOL DIY System to manual with the button located on the right side of the unit under the front panel. In this emergency operation mode, you can test the cooling operation of your unit after installation or to complete a maintenance task.

In auto mode, each unit provides air for your home at your desired comfort level. Set your desired temperature, and the HVAC unit will determine how much heat or air conditioning is needed. You can also set this system to a drying function, which will continue to control the space’s air temperature while dehumidifying.

Use the sleep mode at night to save money on your utilities bills and use less energy. Sleep mode operates in an 8 hour window once turned on.

The MRCOOL DIY Multi-Zone 48,000 BTU 21 SEER four-Zone Ductless Heat Pump Split Air Conditioner System - 9K + 9K + 18K + 18K comes with many options, so you can customize your system based on your needs. Limit your energy usage and save money on your utility bill by using the system’s timer function. If your system begins to run low on refrigerant, an alert will appear on the easy-to-read display on the front of each air handler, letting you know there may be a leak. If you desire to keep a room quiet and minimize lighted alerts, you can mute each indoor unit. By muting the system, the buzzer for alerts will not sound and the LED lit display will turn off. Should the unfortunate event of a power outage occur, the MrCool system will automatically shut off and then back on with the same settings once power returns.

Easily maintain your MRCOOL DIY Multi-Zone 48,000 BTU 21 SEER Four-Zone Ductless Heat Pump Split Air Conditioner Unit with alerts and reminders. Any troubleshooting codes will appear on the front display and the user manual contains an index for common codes. Air filter cleaning alerts are automatic, and you can easily keep the minimal indoor units clean with a dry or damp cloth.


  • Easy DIY® Installation
  • "Pre-charged DIY®
  • Quick Connect Line Set"
  • Simple to Use
  • Multi-room Comfort
  • Energy Efficient DC Inverter
  • 100% Sealed System
  • Gold Fin® Condenser
  • Eco Safe R-410A Refrigerant
  • Smartphone App Controls
  • Lifetime Technical Support
  • Follow Me® Feature
  • Low Ambient Cooling

Condenser Specifications

  • 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)

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
    • 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
  • Modes : Auto - auto selects from Cool, Heat or Fan-Only
    • Dry - dehumidify
    • Cool
    • Heat
    • Fan Only
    • Quiet
    • Sleep

Line Set

  • Length : 16 Feet
  • Liquid Line Size : 1/4"
  • Suction Line Size : 1/2"


                                                  What are typical shipping & processing times for MRCOOL?

                                                  Order processing time is 2-3 business days if the item is in stock. 

                                                  Delivery takes 7-14 business days.

                                                  If a unit is not in stock, it will have a unique lead time depending on the SKU. 

                                                  Once we receive your order, we will send you a confirmation email, and then we process the order by confirming it is in stock and ready for shipment. If any of the items in your order are backordered, we will reach out to you via e-mail or phone and you may choose to either wait or receive a 100% refund.

                                                  We work very hard to ensure that we offer the best prices online. If you find another legitimate online store that offers a lower prices on an identical item we stock (including shipping, tax, etc), we will match the competitor's price and provide superior customer service.

                                                  Please give us a call, email, or live chat with the price and link to the product. 

                                                  **We DO NOT price match with large retailers such as Home Depot, Sams Club, Costco, Ebay, etc.**

                                                  **We will not match pricing on products being sold under Minimum Advertising Price guidelines**

                                                  • Promotions such as rebates and buy one, get one free offer are not eligible
                                                  • The item must be in stock on the competitors' website
                                                  • The competitor must be an online store, they may not have a retail location
                                                  • The website can not be a discounter or auction website (ie; eBay, overstock, etc..)
                                                  • The competitor must be an Authorized Retailer of the product in question, and must not be violating advertising price agreements with the manufacturer
                                                  • The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax

                                                  There may be brands excluded from that offer. Please contact us for further information.

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