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    • MRCOOL DIY 5th Gen Multi-Zone 3-Zone 18,000 BTU 24 SEER2 (6K + 6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes
    • MRCOOL DIY 5th Gen Multi-Zone 3-Zone 18,000 BTU 24 SEER2 (6K + 6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes
    • MRCOOL DIY 5th Gen Multi-Zone 3-Zone 18,000 BTU 24 SEER2 (6K + 6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes
    • MRCOOL DIY 5th Gen Multi-Zone 3-Zone 18,000 BTU 24 SEER2 (6K + 6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes
    • MRCOOL DIY 5th Gen Multi-Zone 3-Zone 18,000 BTU 24 SEER2 (6K + 6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes
    • MRCOOL DIY 5th Gen Multi-Zone 3-Zone 18,000 BTU 24 SEER2 (6K + 6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes
    • MRCOOL DIY 5th Gen Multi-Zone 3-Zone 18,000 BTU 24 SEER2 (6K + 6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes
    • MRCOOL DIY 5th Gen Multi-Zone 3-Zone 18,000 BTU 24 SEER2 (6K + 6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes
    Sale!

    MRCOOL DIY 5th Gen Multi-Zone 3-Zone 18,000 BTU 24 SEER2 (6K + 6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes

    20% Off
    Sale Price $6,333.00 Regular Price $7,916.25
    Line Set for 6K Air Handler #1: 16 Ft
    Line Set for 6K Air Handler #2: 16 Ft
    Line Set for 9K Air Handler: 16 Ft
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    Upgrade your comfort with the MRCOOL DIY 5th Gen Multi-Zone 18,000 BTU 3-Zone Ductless Mini-Split System with Ceiling Cassettes—the ultimate solution for discreet, efficient, and customizable climate control. Designed for spaces that demand both performance and aesthetics, this system supports up to three ceiling cassette air handlers in any combination of 6K, 9K, or 12K BTUs.

    This system features MRCOOL’s DIY® installation technology, allowing homeowners to handle setup without special tools, training, or professional labor. The low-profile ceiling cassettes blend seamlessly into your ceiling, maximizing wall space while delivering powerful airflow throughout the room.

    Each zone operates independently and can be controlled remotely via the MRCOOL SmartHVAC app, or by voice with Amazon Alexa and Google Assistant. Whether you're heating or cooling, this system provides quiet, even comfort all year long.


    Key Features:

    • 18,000 BTU condenser supports up to 3 zones

    • Pairs with 6K–12K BTU ceiling cassette air handlers

    • True DIY® installation with quick-connect lines

    • Ultra-slim ceiling cassette design for flush mounting

    • SEER2 rating up to 22.3 for high energy efficiency

    • Individual zone control via smartphone or voice

    • Whisper-quiet operation and automatic swing functionality

    • Gold Fin® corrosion-resistant technology


    What’s Included:

    • (1) 18K BTU 5th Gen Multi-Zone DIY Condenser

    • (3) Ceiling Cassette Air Handlers (size varies by configuration)

    • (3) Remotes

    • Full Installation accessories

    DIY OUTTASIGHT BROCHURE

    MULTIZONE BROCHURE

    INSTALL MANUAL

    REMOTE MANUAL

    WARRANTY DOC

    ACCESSORY MANUAL

    BRAND NAME MRCOOL
    SERIES
    DIY 5th gen Multi-Zone Mini-splits
    MODEL
    DIY-MULTI3-18HP230D-O
    GTIN 840255587617
    UPC 840255587617
    SHORT DESCRIPTION
    MRCOOL® 18k DIY 5th Generation 3 Zone Multi-Zone Mini-Split Condenser 230v
    LONG DESCRIPTION
    We are thrilled to announce our new 5th Generation MRCOOL® DIY® 18k BTU Multi-Zone Ductless Mini Split Condenser, which is the best and most convenient way to get comfortable. You won’t need the services of an HVAC professional to install this unit, because it’s do-it-yourself! Achieving a SEER2 rating of 23.9 and an HSPF2-4 rating of 10, you can rest easy knowing this unit will help you save money as you chill. This condenser can also support up to three air handlers, meaning it can heat and cool three rooms that are a combined 750 square feet in size, making it a perfect option if you have spare bedrooms in need of heating and cooling. What makes this system different is our patented pre-charged Quick Connect® line sets filled with R-454B, an incredibly efficient and eco-friendly refrigerant. This switch from the previous refrigerant makes the system even more efficient and sustainable than before. The design of these innovative line sets allow you to install the system yourself, saving you time and money. These line sets are sold separately. This condenser is more than just a heating and cooling unit. When operating as a system, you will be able to experience total customization with the unit’s wealth of features. For example, you can integrate your system with Amazon Alexa or Google Home through the Smart HVAC app, allowing you to control your system with your voice and monitor its operation with the touch of a button. You can also set schedules, temperature ranges, and mode of operation through the app. The power of comfort is in your hands with this system. In the unlikely event that something happens to the system, we’ve got you covered. The DIY® series comes with one of the best warranties in the industry - a 7 year compressor warranty, a 5 year parts warranty, and a Limited Lifetime Replacement warranty with enrollment in the MRCOOL® Care Program. Give yourself the best comfort with the DIY®.
    FEATURE LIST
    Intertek listed 5031495
    Easy DIY installation

    Future-proof your investment with the included DIYPro® cable, eliminating the need for electrical conduit.
    Keep the included remote close by, and MRCOOL DIY®'s Follow Me® function will track the air temperature around you to ensure maximum comfort.
    The MRCOOL® Smart HVAC Controller® Module and App fully support Google Assistant & Amazon Alexa out of the box.
    SEER2 23.9
    EER2 13
    HSPF2-4 10
    HSPF2-5 7.8
    TONNAGE 1.5
    COOLING CAPACITY (BTU) 18000
    HEATING CAPACITY (BTU) 18000
    VOLTAGE (V) 208/230
    PHASE 1
    CYCLE 60
    MAX FUSE BREAKER (A) 20
    MIN CIRCUIT AMPACITY (A) 16
    COLOR White
    ZONE CAPACITY 3
    REFRIGERANT TYPE R-454B
    REFRIGERANT VOLUME (OZ) 61.73
    DECIBEL RATING (DBA) 60
    INVERTER DC
    LINE SET LENGTH 25
    MAX LINESET LENGTH (FT) 172.2
    LIQUID LINE SIZE 1/4
    SUCTION LINE SIZE 3/8
    COMPRESSOR MOTOR TYPE Rotary
    AUXILIARY HEATER INCLUDED No
    AUXILIARY HEATER AVAILABLE No
    FAN ONLY OPTION Yes
    QUIET MODE Yes
    AUTO COOL Yes
    WIFI COMPATIBILITY Yes
    APP COMPATIBILITY Yes
    WORKS WITH IOS Yes
    WORKS WITH ANDROID Yes
    UL LISTED Yes
    ETL LISTED Yes
    ENERGY STAR CERTIFIED Yes
    AHRI CERTIFIED Yes
    REGISTERED WARRANTY
    Extended Limited Lifetime*
    BASE PARTS WARRANTY 5
    BASE COMPRESSOR WARRANTY 7
    HAS BATTERIES Yes
    CONTAINS ELECTRONICS Yes
    CONTAINS CHEMICALS Yes
    CONTAINS AEROSOL Yes
    CONTAINS COMPRESSED GAS Yes
    PROPOSITION 65 WARNING Yes
    NET DEPTH (IN) 13.46
    NET HEIGHT (IN) 26.5
    NET WIDTH (IN) 35.04
    NET WEIGHT (LBS) 101.63
    GROSS DEPTH (IN) 17.24
    GROSS HEIGHT (IN) 29.53
    GROSS WIDTH (IN) 40.55
    GROSS WEIGHT (LBS) 109.57
    Product Specifications
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    Service & Support

    Manufacturer Warranty

    This product is covered by the manufacturer’s warranty against defects in materials and workmanship when installed and used according to the manufacturer’s guidelines. Warranty terms and coverage periods vary by manufacturer and product type. Please refer to the official product documentation or contact our team if you need help verifying warranty details.

    Technical Support

    Freedom HVAC Supply is staffed by people who actually understand HVAC systems. If you need help confirming compatibility, selecting the correct replacement part, or understanding installation requirements, our team is available to assist before and after your purchase.

    Product Documentation

    Installation manuals, specification sheets, wiring diagrams, and other technical documentation are available whenever possible. These resources help ensure proper installation, system compatibility, and safe operation of your equipment.

    Parts Compatibility & Cross-Reference

    Many HVAC parts replace or supersede older manufacturer part numbers. We provide replacement part numbers and compatible model information on product pages to help technicians and homeowners verify the correct component before ordering.

    Replacement Parts & Accessories

    Freedom HVAC Supply carries genuine replacement components and compatible accessories to keep HVAC systems running reliably. From control boards and motors to sensors, line sets, and installation accessories, we supply the parts professionals depend on.

    Customer Support

    If you have questions about product compatibility, warranty coverage, or installation considerations, our support team is ready to help. Our goal is to make sure you get the right part the first time so your system can get back up and running quickly.

    FAQs About Our HVAC Products

    Quick answers to questions about ordering, compatibility, and installation.

    Ordering & Compatibility

    1. Do you sell HVAC equipment to homeowners and DIY installers?

    Yes. Freedom HVAC Supply sells HVAC equipment and parts to contractors, property owners, and qualified DIY installers. Some products may require professional installation based on local codes.

    2. How do I know if this HVAC product is compatible with my system?

    Product pages include specifications and compatibility details. If you’re unsure, our team can help verify fit before you order.

    3. Can HVAC contractors purchase from Freedom HVAC Supply?

    Absolutely. We work with licensed HVAC contractors, installers, and professionals nationwide.

    Installation & Support

    1. Do HVAC systems require professional installation?

    Some HVAC equipment must be installed by a licensed professional to meet code requirements or warranty terms. Always review manufacturer guidelines.

    2. Can you help me choose the right HVAC system or part?

    Yes. Our support team can assist with product selection based on your application, space, and installation needs.

    3. Do you provide installation manuals or documentation?

    Manufacturer installation guides and documentation are included or available upon request for most products.

    Warranty & Shipping

    1. Do HVAC products include a manufacturer warranty?

    Most HVAC equipment includes a manufacturer warranty when installed according to guidelines. Warranty terms vary by brand and product.

    2. Do you ship HVAC equipment nationwide?

    Yes. We ship HVAC systems and parts throughout the continental United States using trusted freight and parcel carriers.

    3. What should I know about freight delivery for HVAC equipment?

    Larger HVAC equipment ships via freight and should be inspected upon delivery. Delivery details are provided during checkout.

    Need HVAC Help?

    Get help with ordering, compatibility, or installation questions.

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