SKU: 63354017790

MRCOOL DIY Mini Split - 21,000 BTU 2 Zone Ceiling Cassette Ductless Air Conditioner and Heat Pump with Install Kit Select LIne Set Length

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Description

MRCOOL DIY Mini Split - 21,000 BTU 2 Zone Ceiling Cassette Ductless Air Conditioner and Heat Pump with Install Kit Select LIne Set LengthMRCOOL DIY 4th Gen 18K BTU Dual Zone Ceiling Cassette Mini Split System (9K + 12K) The MRCOOL DIY 4th Gen Dual Zone Mini Split System is a cutting edge HVAC solution that combines energy efficiency, sleek design, and DIY friendly installation. This system includes everything you need to heat and cool two separate spaces with ease. Featuring both a 9K BTU ceiling cassette and a 12K BTU ceiling cassette, this system provides tailored comfort for areas

MRCOOL DIY 4th Gen 18K BTU Dual Zone Ceiling Cassette Mini Split System (9K + 12K)

The MRCOOL DIY 4th Gen Dual Zone Mini Split System is a cutting-edge HVAC solution that combines energy efficiency, sleek design, and DIY-friendly installation. This system includes everything you need to heat and cool two separate spaces with ease. Featuring both a 9K BTU ceiling cassette and a 12K BTU ceiling cassette, this system provides tailored comfort for areas up to 375 sq. ft. and 500 sq. ft., respectively. The 21 SEER efficiency rating ensures cost-effective operation while delivering powerful heating and cooling performance.


What’s Included

  1. MRCOOL DIY 18K BTU 2-Zone Condenser:

    • High-performance heating and cooling with up to a 21 SEER efficiency rating.
    • Operates reliably in extreme temperatures, heating as low as -13°F and cooling up to 122°F.
    • Backed by a 7-year compressor replacement warranty and a 5-year parts warranty for peace of mind.
  2. Ceiling Cassette Air Handlers:

    • 9K BTU Air Handler:
      • Covers up to 375 sq. ft..
      • Features multiple operating modes: Cool, Heat, Auto, Dry, and Sleep.
    • 12K BTU Air Handler:
      • Covers up to 500 sq. ft..
      • Includes versatile modes for personalized comfort.
    • Both air handlers offer low-profile installation and a discreet design.
  3. Pre-Charged Line Sets (16, 25, 35, or 50 ft.):

    • Pre-filled with R-410A refrigerant for a DIY-friendly installation.
    • Quick Connect fittings make setup fast, easy, and secure.

System Highlights

1. Energy Efficiency

  • 21 SEER Efficiency Rating: Optimized for energy savings without sacrificing performance.
  • Eco-Friendly Refrigerant: Uses R-410A, a non-ozone-depleting refrigerant, for sustainable operation.

2. DIY Installation

  • No HVAC Technician Required: Pre-charged line sets and easy instructions make setup straightforward for homeowners.
  • Cost-Effective: Save thousands on installation while enjoying professional-grade performance.

3. Advanced Ceiling Cassette Design

  • Sleek and Discreet: The ceiling-mounted air handlers blend seamlessly into any room, conserving wall space and enhancing aesthetics.
  • Easy Maintenance: With the Elevation Function, the filter panel lowers for quick and effortless cleaning.
  • Quiet Operation: Enjoy whisper-quiet performance, ideal for bedrooms, living rooms, or offices.

4. Reliable Year-Round Comfort

  • Extreme Temperature Operation: Capable of heating in temperatures as low as -13°F, ensuring dependable performance in harsh climates.
  • Wide Coverage: Heat and cool two separate rooms with tailored comfort for each space.

Specifications

Condenser

  • Cooling Capacity: 18,000 BTU
  • Heating Capacity: 18,000 BTU
  • Efficiency Ratings: SEER: 21, EER: 12.5
  • Operating Temperatures: Heating: -13°F to 75.2°F | Cooling: 5°F to 122°F
  • Warranty: 7-year compressor replacement, 5-year parts
  • Dimensions: 35.04"W x 13.46"D x 26.50"H

Ceiling Cassette Air Handlers

  • 9K BTU Air Handler:
    • Coverage: Up to 375 sq. ft.
    • Modes: Cool, Heat, Auto, Dry, Sleep
    • Dimensions: 50.31"W x 13.19"D x 8.98"H
  • 12K BTU Air Handler:
    • Coverage: Up to 500 sq. ft.
    • Modes: Cool, Heat, Auto, Dry, Sleep
    • Dimensions: 50.31"W x 13.19"D x 8.98"H

Pre-Charged Line Sets

  • Lengths Available: 16, 25, 35, or 50 feet
  • Pre-Charged Refrigerant: R-410A
  • DIY Installation: Quick Connect fittings for secure, leak-proof connections

Benefits of the MRCOOL DIY Ceiling Cassette System

  1. Customizable Comfort: Heat or cool two rooms independently with dual air handlers.
  2. Sleek, Low-Profile Design: Ceiling cassettes provide a clean, unobtrusive solution for heating and cooling.
  3. Easy DIY Installation: Save time and money with pre-charged line sets and simple setup.
  4. Energy Efficiency: Lower your utility bills with an industry-leading SEER rating.
  5. Durable and Reliable: Operates in extreme temperatures with robust warranties for long-term peace of mind.

Perfect Applications

  • Homes: Ideal for bedrooms, living rooms, home offices, or bonus rooms.
  • Offices: Maintain efficient climate control in workspaces.
  • Renovations: Flexible and efficient for retrofitting older spaces without ductwork.

Order Now

The MRCOOL DIY 4th Gen 18K BTU Dual Zone Ceiling Cassette Mini Split System offers a unique blend of energy efficiency, modern design, and unparalleled convenience. Perfect for homeowners and DIY enthusiasts, this system is your solution for reliable heating and cooling in two separate spaces.

Order today from MRCOOL DIY Direct and start enjoying personalized comfort in every room!

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 63354017790

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4.7 ★★★★★
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Verified Purchase
Brian Olson
Chelsea, US
★★★★★ 4
Cool as the other side of the pillow
Color: Gray, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
Good quality and keeps cool on side of pillow. Have to flip pillow for constant cooling is the ok only down side. Love the material as it is very soft and silky feel to it. Doesn't wrinkle over pillow and had some good color options. Easy to clean. Fair price for a good product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 11, 2026
N
Verified Purchase
Nik
Boise, US
★★★★★ 5
Love!
Color: Blue, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
Awesome cases! They really are cool to the touch. I didn’t sleep hot at all. I have a “cut-out” memory foam pillow, and this stretched around it perfectly. It is flexible enough that it doesn’t impede with the cut out. And while the material is “silky,” it doesn’t slide around the pillow while sleeping on it. The zipper feature is perfect. I washed and dried per the tag instructions and they washed very well. Super happy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
J
Verified Purchase
Jane - NY
Omaha, US
★★★★★ 5
AMAZING - LOVE THESE!
Color: Blue, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
I've been using these pillow cases for more than 6 months and LOVE them. They are well made, no wrinkling, fraying or wearing out, even with a weekly washing. I love the zippers on them, my pillows fits perfectly in the case and don't constantly escape from the case overnight. They definitely perform as described: they keep me cool at night and don't smell and actually don't make a mess of my hair. I bought an extra one and put it on a pillow I keep close to my body which helps me from overheating during the night. They are a great value for the price, I wish I could get top sheets in the same style as these and I'd be in heaven!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 23, 2026
A
Verified Purchase
Amazon Customer
Louisville, US
★★★★★ 3
Cool Pillowcases
Color: Gray, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
These pillow cases are silky soft and cool to the touch. They don’t stay as cool as I would like, however, so I find myself moving around on the pillow to find a cool spot or flipping the pillow over. I have washed them several times and the coolness seems to be diminishing. Still, it’s better than a regular cotton pillow case. The zipper is needed and helps keep the material on the pillow.
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Reviewed in the United States on August 20, 2025
S
Verified Purchase
Scott Mautino
Phoenix, US
★★★★★ 5
By far the best cooling pillow case I’ve bought highly recommend
Color: Blue, Size: Standard, Set name: Silky
Highly recommend best cooling pillow case I’ve bought very soft and comfortable seems to be made from good material as well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026

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