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Pre-Order the new 5th Gen Series!

MRCOOL DIY Mini Split - 18,000 BTU Single Zone Ceiling Cassette Ductless Air Conditioner and Heat Pump with 25 ft. Install Kit, DIY-18-HP-CASS-230C25

5.0 5 reviews
Model: DIY-18-HP-CASS-230C25
$3,683.40
$3,683.40 $4,092.67
-10%
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Buy Now, Pay Later

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

$3,683.40
$3,683.40 $4,092.67

Product Overview

  • Zones: 1

  • DIY Installation

  • Pre-Charged Line Sets

  • Voltage: 208-230V

  • Outdoor Operating Temp (Cool): -13°F to 122°F

  • Outdoor Operating Temp (Heat): -13°F to 75.2°F

What's Included

Better Together

System Details

DESCRIPTION

This 4th Generation MRCOOL Mini Split includes a DIY 18,000 BTU Single Zone Condenser, one 18,000 BTU Ceiling Cassette Air Handler, one 25' Pre-Charged Lineset and one Remote. The best part about all of this is that you can install it yourself!

Mini Split Includes
  • Energy Efficient. This 1 Zone condenser, when paired with select MRCOOL air handlers, is capable of producing an impressive 22 SEER efficiency rating.
  • Works In All Environments. The capability to continue to deliver heating performance when temperatures reach -13F.
  • 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, 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.
    • Out of Sight Design. This unit has low profile installation for out of sight heating & cooling.
    • Worry-Free Installation. Easily install between all types of joists on 16" center - including pre-manufactured I-joists
    • Easy Air Filter Access. By activating the Elevation function on the remote controller (or smart controller), the filter panel will lower for easy air filter maintenance.

    Line Set 25 ft., Quantity 1

    • Pre-Charged. These copper 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!

    SPECIFICATIONS & DIMENSIONS

    • Condenser
    • Product Dimensions: 35.04"W x 13.46"D x 26.50"H
    • Cooling Capacity: 18,000 BTU
    • Heating Capacity: 18,000 BTU
    • Zone Capacity: 1
    • Cool Mode - Outdoor Operating Temperature Range: -13F ~ 122F
    • Heat Mode - Outdoor Operating Temperature Range: -13F ~ 75F
    • SEER: 22
    • EER: 12.5
    • Voltage: Requires a minimum of 208V-230V/60HZ/18-30A (please check your home meets this electrical requirement prior to purchase)
    • Air Handler 18K BTU
    • Product Dimensions: 50.31"W x 13.19"D x 8.98"H
    • Mount Type: Ceiling Cassette
    • Cooling Capacity: 17,000 BTU
    • Heating Capacity: 19,000 BTU
    • Modes: Auto - Auto selects from Cool, Heat or Fan-OnlyDry - dehumidifyCoolHeatFan OnlyQuietSleep
    • Line Set
    • Length: 25 Feet
    • Liquid Line Size: 1/4"
    • Suction Line Size: 1/2"

    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.

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    Customer Reviews

    Based on 5 reviews
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    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
    J
    Joseph Dauphinais
    DIY ceiling cassette.

    Very detailed instructions. Had no problems installing. Keeps the whole 1st floor warm. Very impressed.

    User picture
    J
    Jonathan D.
    DIY heat pump

    not to hard to install. outside unit defiantly needs two people to lift if your doing an elevated install. buy a pipe bender for the half inch refrigerant line so you don't kink the lineset and need to buy a replacement. it's cheaper to get the tool than to replace the lineset.

    R
    Richard Gravitte
    Very quite

    This ceiling mounted cassette is also very quite.

    L
    Lyndy Little
    The order/delivery process

    Premium Home Source coordinated our purchase and delivery perfectly.