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MRCOOL DIY 4th Gen Ceiling Cassettes - 36K BTU 3-Ton 4-Zone (9K + 9K + 9K + 18K) Ductless Mini-Split AC and Heat Pump
Indoor Unit Type
Wall Mounted
What are the best pre-charged line sets
and communication wires for you?

Regular price: $9,220

$6,454
30% OFF

What’s Included

Condenser (x1)

Cassette (x4)

Line Set (x4)

Remote Ctrl (x4)

No more long waits or unresponsive care!

Enjoy 24/7 support, personal follow-ups, and direct access to MrCool tech support for quick help with any system issues. Valid only for purchases made through our website.

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  • Product Description
  • Spec. & Dimensions
  • Reviews
  • Sizing Guide
  • Warranty & Manuals
  • Shipping Policy
  • FAQ

Introducing the MRCOOL DIY Ceiling Cassette System - 36K BTU 3-Ton 4-Zone (9K + 9K + 9K + 18K) Ductless AC and Heat Pump

Welcome to a new level of home comfort with the MRCOOL DIY Ceiling Cassette System. Ideal for those who appreciate innovative technology and exceptional efficiency in climate control, this system provides a user-friendly solution to both heating and cooling needs, ensuring seamless integration into any living space without compromising on style. The MRCOOL DIY ceiling cassette system is versatile, available in 2 to 5 zones and capacities of 18K, 27K, 36K, and 48K BTU, catering to various room sizes and requirements. If you’re looking for a single-room solution, check out our 18K single zone system for more details.

What Makes the MRCOOL DIY Ceiling Cassette System Unique?

The MRCOOL DIY Ceiling Cassette System stands out for its potent yet unobtrusive heating and cooling capabilities, seamlessly integrating into any home decor. One of the key differentiators of the latest models is their outstanding energy efficiency. The 4th Gen DIY Ceiling Cassette offer impressive SEER ratings, with the 48K BTU multi-zone systems starting at 18.3 and the 18K multi-zone systems reaching up to 22.5. This range of efficiency not only enhances energy conservation but also provides a cost-effective choice for homeowners. Additionally, these systems are Energy Star Certified, emphasizing their role in promoting environmental stewardship and sustainable living practices.

How Does It Excel in Extreme Weather Conditions?

  • Heating: Operates at 100% capacity down to -5°F and continues to function up to -13°F, providing dependable warmth during the coldest months.
  • Cooling: Delivers full cooling capacity up to 122°F, ensuring your comfort even in peak summer heat.
  • Dry Mode: Manages humidity efficiently between 32°F and 122°F, which is perfect for reducing moisture without overly cooling the room—though high humidity might lead to water droplets.

Advanced Features of the MRCOOL DIY Ceiling Cassette System

  • Pre-Charged DIY® Line Set: Allows for straightforward installation, simplifying the setup process without the need for professional HVAC help.
  • Eco-Safe R-410A Refrigerant: Recognized for its kink-resistant and leak-proof properties, enhancing both environmental safety and operational efficiency.
  • High EER/SEER Ratings: Part of the MRCOOL® DIY® Series, known for its energy efficiency, making it a smart choice for energy-conscious homeowners.
  • Gold Fin® Condenser: Ensures long-term performance, even in coastal or corrosive environments.
  • Smart Home Integration: Compatible with Amazon Alexa and Google Home for voice-controlled convenience.
  • Follow Me® Technology: Adjusts climate settings based on your location within the room, providing personalized comfort.
  • Low Ambient Cooling: Maintains reliable performance regardless of external temperature fluctuations.
  • Smartphone App: Includes tools for remote management, such as DC inverter control and leakage detection.
  • Quiet Mode: Significantly reduces operational noise, making it ideal for uninterrupted sleep or quiet moments at home.

Can Maintenance Really Be Effortless?

Absolutely! With the MRCOOL DIY Ceiling Cassette, replacing the air filter is a total breeze. Thanks to the design that allows the air filter to be lowered remotely, you can forget about the hassle of climbing ladders. This feature is just another way that MRCOOL makes home maintenance simpler and safer.

Why Choose the MRCOOL DIY Ceiling Cassette?

Choosing the MRCOOL DIY Ceiling Cassette System means selecting a sophisticated, reliable, and efficient solution for managing your indoor climate. This system exemplifies dedication to innovation, quality, and user convenience. With its sleek air handlers designed to be ceiling-mounted, it offers flexibility in placement to optimize space and airflow in any room, whether retrofitting an older building or incorporating into new construction. Providing not just comfort but also a smart, environmentally friendly approach to modern living, its easy DIY installation, adaptable setup, and straightforward maintenance make it an intelligent choice for homeowners seeking effective and stylish climate control solutions. For detailed setup information, check out our MRCOOL Installation Guide.

Frequently Asked Questions (FAQs)

Q: What size options are available for the MRCOOL DIY Ceiling Cassette System?
The system is available from 2 to 5 zones and in various BTU capacities including 18K, 27K, 36K, and 48K.

Q: Can the system handle extreme cold and hot temperatures?
Yes, it operates effectively at full heating capacity down to -5°F and can cool efficiently even up to 122°F.

Q: Is the installation process manageable for a DIY enthusiast?
Absolutely, the system comes with a pre-charged line set designed for easy DIY installation, though professional assistance is recommended if you are unsure about the process.

Q: How does the system integrate with smart home technologies?
It is compatible with major smart home systems like Amazon Alexa and Google Home, allowing for voice control and smart home integration.

Q: What are the benefits of the Eco-Safe R-410A Refrigerant?
This refrigerant is eco-friendly, efficient, and designed to be kink-resistant and leak-proof, enhancing both the system's performance and its environmental footprint.

Q: Does the system come with any remote management features?
Yes, it includes a smartphone app that provides remote control capabilities, including DC inverter control and leakage detection.

  • Introducing the MRCOOL DIY Ceiling Cassette System - 36K BTU 3-Ton 4-Zone (9K + 9K + 9K + 18K) Ductless AC and Heat Pump

    Welcome to a new level of home comfort with the MRCOOL DIY Ceiling Cassette System. Ideal for those who appreciate innovative technology and exceptional efficiency in climate control, this system provides a user-friendly solution to both heating and cooling needs, ensuring seamless integration into any living space without compromising on style. The MRCOOL DIY ceiling cassette system is versatile, available in 2 to 5 zones and capacities of 18K, 27K, 36K, and 48K BTU, catering to various room sizes and requirements. If you’re looking for a single-room solution, check out our 18K single zone system for more details.

    What Makes the MRCOOL DIY Ceiling Cassette System Unique?

    The MRCOOL DIY Ceiling Cassette System stands out for its potent yet unobtrusive heating and cooling capabilities, seamlessly integrating into any home decor. One of the key differentiators of the latest models is their outstanding energy efficiency. The 4th Gen DIY Ceiling Cassette offer impressive SEER ratings, with the 48K BTU multi-zone systems starting at 18.3 and the 18K multi-zone systems reaching up to 22.5. This range of efficiency not only enhances energy conservation but also provides a cost-effective choice for homeowners. Additionally, these systems are Energy Star Certified, emphasizing their role in promoting environmental stewardship and sustainable living practices.

    How Does It Excel in Extreme Weather Conditions?

    • Heating: Operates at 100% capacity down to -5°F and continues to function up to -13°F, providing dependable warmth during the coldest months.
    • Cooling: Delivers full cooling capacity up to 122°F, ensuring your comfort even in peak summer heat.
    • Dry Mode: Manages humidity efficiently between 32°F and 122°F, which is perfect for reducing moisture without overly cooling the room—though high humidity might lead to water droplets.

    Advanced Features of the MRCOOL DIY Ceiling Cassette System

    • Pre-Charged DIY® Line Set: Allows for straightforward installation, simplifying the setup process without the need for professional HVAC help.
    • Eco-Safe R-410A Refrigerant: Recognized for its kink-resistant and leak-proof properties, enhancing both environmental safety and operational efficiency.
    • High EER/SEER Ratings: Part of the MRCOOL® DIY® Series, known for its energy efficiency, making it a smart choice for energy-conscious homeowners.
    • Gold Fin® Condenser: Ensures long-term performance, even in coastal or corrosive environments.
    • Smart Home Integration: Compatible with Amazon Alexa and Google Home for voice-controlled convenience.
    • Follow Me® Technology: Adjusts climate settings based on your location within the room, providing personalized comfort.
    • Low Ambient Cooling: Maintains reliable performance regardless of external temperature fluctuations.
    • Smartphone App: Includes tools for remote management, such as DC inverter control and leakage detection.
    • Quiet Mode: Significantly reduces operational noise, making it ideal for uninterrupted sleep or quiet moments at home.

    Can Maintenance Really Be Effortless?

    Absolutely! With the MRCOOL DIY Ceiling Cassette, replacing the air filter is a total breeze. Thanks to the design that allows the air filter to be lowered remotely, you can forget about the hassle of climbing ladders. This feature is just another way that MRCOOL makes home maintenance simpler and safer.

    Why Choose the MRCOOL DIY Ceiling Cassette?

    Choosing the MRCOOL DIY Ceiling Cassette System means selecting a sophisticated, reliable, and efficient solution for managing your indoor climate. This system exemplifies dedication to innovation, quality, and user convenience. With its sleek air handlers designed to be ceiling-mounted, it offers flexibility in placement to optimize space and airflow in any room, whether retrofitting an older building or incorporating into new construction. Providing not just comfort but also a smart, environmentally friendly approach to modern living, its easy DIY installation, adaptable setup, and straightforward maintenance make it an intelligent choice for homeowners seeking effective and stylish climate control solutions. For detailed setup information, check out our MRCOOL Installation Guide.

    Frequently Asked Questions (FAQs)

    Q: What size options are available for the MRCOOL DIY Ceiling Cassette System?
    The system is available from 2 to 5 zones and in various BTU capacities including 18K, 27K, 36K, and 48K.

    Q: Can the system handle extreme cold and hot temperatures?
    Yes, it operates effectively at full heating capacity down to -5°F and can cool efficiently even up to 122°F.

    Q: Is the installation process manageable for a DIY enthusiast?
    Absolutely, the system comes with a pre-charged line set designed for easy DIY installation, though professional assistance is recommended if you are unsure about the process.

    Q: How does the system integrate with smart home technologies?
    It is compatible with major smart home systems like Amazon Alexa and Google Home, allowing for voice control and smart home integration.

    Q: What are the benefits of the Eco-Safe R-410A Refrigerant?
    This refrigerant is eco-friendly, efficient, and designed to be kink-resistant and leak-proof, enhancing both the system's performance and its environmental footprint.

    Q: Does the system come with any remote management features?
    Yes, it includes a smartphone app that provides remote control capabilities, including DC inverter control and leakage detection.

  • Product Specifications

  • MRCOOL DIY Mini Split Sizing Guide

    Which air handler is best for your room size?

    The size of your room is the main factor in choosing the right unit. MRCOOL DIY 4th Gen comes in various sizes, each designed to cool and heat specific square footage ranges.

    Here's a quick reference for choosing the right BTU based on your room size:

    • 9,000 BTU covers up to 375 square feet.
    • 12,000 BTU covers up to 550 square feet.
    • 18,000 BTU covers up to 800 square feet.
    • 24,000 BTU covers up to 1,050 square feet.
    • 36,000 BTU covers up to 1,550 square feet.

    How BTU Limits Work in Your Mini-Split System

    You can opt for high BTU air handlers for strong heating and cooling. But, if you plan to run multiple air handlers at the same time, consider the main unit's (condenser) maximum power.

    Here’s the deal: Suppose your condenser can handle 18,000 BTU, and you have two indoor air handlers, each at 12,000 BTU. If both run simultaneously, they’ll automatically adjust to 9,000 BTU each to match the condenser's limit. This ensures the system runs safely.

    If you usually run one air handler at a time, a lower BTU condenser might be sufficient. But if you plan to use all air handlers together, a higher BTU condenser is the way to go. This lets you enjoy the full power of each air handler without overloading the system.

    By considering these factors, you can ensure your MRCOOL DIY 4th Gen unit is perfectly sized for your needs, keeping you comfortable year-round.

    For personalized assistance or further clarification, please feel free to contact our customer support via chat or call. Our team is ready to help you make the best choice for your cooling needs.

  • DIY Multi-Zone Manuals

    MRCOOL DIY Mini Splits Warranty

    MRCOOL distributor (hereinafter “Company”) warrants this product against failure due to defects in materials or workmanship under normal use and maintenance as follows:

    • Standard Warranty: 5-year parts warranty and 7-year compressor warranty.
    • Limited Lifetime Compressor Warranty: Available if specific conditions are met.

    Conditions for Limited Lifetime Compressor Warranty:

    • Registration: The unit must be registered at the following web address: https://mrcool.com/warranty within 60 days of the installation date.
    • MrCool Care Program Enrollment: The original, registered owner must enroll in the MrCool Care program within 4 months from the installation date. This program requires a biannual fee and includes a DIY cleaning kit for regular maintenance.
    • Regular Maintenance: The unit must be cleaned biannually using the MrCool Care kit as part of the preventative maintenance to ensure proper function throughout its lifespan.

      Coverage Details:

      • Within the First 7 Years: If compressor failure occurs, verified by diagnostic testing performed by a certified HVAC technician, the warranty provides one entire unit replacement (equipment only).
      • After 7 Years: The limited lifetime compressor warranty covers the cost of a replacement compressor (equipment only).

      Important Notes:

      • The warranty does not cover any costs incurred for diagnosis or replacement of equipment.
      • If the original owner does not register the unit, the warranty defaults to the standard 5-year parts and 7-year compressor warranty.

      📑 DIY Multi-Zone Brochure

      📑 Quick Start Setup Guide

      📑 Installation Owner's Manual

      📑 Performance Specification

      📑 Troubleshooting Solution Guide

      📑 Remote Control User Manual

      📑 Ceiling Cassette Manual

      📑 Ceiling Cassette Specification

      📑 Warranty Statement

      📑 Multi-Zone AHRI Certifications: 18K BTU - 27K BTU - 36K BTU - 48K BTU

      📑 Multi-Zone Energy Guide Certifications: 18K BTU - 27K BTU - 36K BTU - 48K BTU

    1. Shipping and Delivery Policy: Important Information and Customer Responsibilities

      • Free shipping is only for kept orders. If customers want to return their items, they will need to pay for shipping back to us and the original shipping cost, as we do not get a refund for that.
      • Processing and shipping durations are approximate, and unforeseen setbacks may arise from circumstances like weather conditions, natural catastrophes, or logistical challenges.
      • Tracking information is typically available within 1-3 days after shipping. If the tracking number is not functional at the time you check, please wait 24 hours before contacting us as updates may take time.

      Journey to Delivery: A Two-Part Timeline

      1. Processing Time

        • Order verification takes on average 24 hours.
        • Accessories-only orders dispatch in 1-2 business days.
        • Complete system orders take 2-3 business days.

      2. Shipping Time

        • Accessories are typically delivered in 2-4 business days.
        • A complete system may take up to 7 business days, which can vary, especially in remote areas.

      Freight Shipments

      • Freight shipments may face delivery restrictions in residential areas due to factors such as narrow roads or restrictions on delivering to apartment buildings above the ground floor.
      • Deliveries are only made to the front of the building and not up the stairs to the door.
      • In the event of a missed delivery, any issues or extra costs incurred will be the responsibility of the customer.
      • To avoid any problems or returns, it is important for the customer to arrange delivery and be prepared to pick up the shipment at the shipping facility if a failed delivery attempt occurs.

      Customer Responsibilities

      • Customers are responsible for providing complete and accurate shipping addresses to FrosthubUSA.com.
      • We're unable to make changes to your shipping address once a package leaves our warehouse, and we're not liable for packages that are lost due to incomplete or inaccurate addresses.
      • All orders reported as "Delivered" by shipping companies are considered delivered, and FrosthubUSA.com cannot be held liable for non-delivery in this case.
      • If a delivery fails for any reason and the address provided by the customer was correct, FrosthubUSA.com cannot be held liable if a package is returned to our warehouse.
      • The order placed by the customer on our website is the order FrosthubUSA.com will ship to the customer. We cannot be held liable for the customer receiving the wrong item if they placed the wrong order.

      Equipment Arrival

      • Shipping transit times are not guaranteed and may vary depending on your delivery address.
      • Once your order arrives, make sure to inspect each and every item on the pallet. Count the number of items (boxes) on the shipment. Ensure your count matches the count printed on the delivery receipt before signing for your delivery.
      • Missing items or incorrect items that were noted on the delivery receipt must be reported within 24 hours of receiving your order by contacting our customer service department.
      • We reserve the right to reject any claim for missing items if not reported within the twenty-four-hour period.
      • After taking count of the pieces on your shipment, remove wrapping or boxes and inspect each item of equipment thoroughly in the presence of the driver.
      • Do not sign the delivery receipt until you have thoroughly inspected each item. Check all of the equipment to make sure it is not dented or badly scratched.
      • Make sure to mark the delivery receipt clear, short, wrap broken, or damaged after inspecting your shipment thoroughly.

      Making Notes on the Delivery Receipt

      • The customer is responsible for ensuring that the products being received are free of damages and/or shortages.
      • If the items or boxes on the shipment do not match the number listed on the delivery receipt, mark the receipt as short. A packing slip will be attached to the shipment for your reference. Ensure to note on the delivery receipt which items are missing.
      • We will work with the shipping company to track the missing items. Please allow up to 7 business days for the shipping company to locate your items.
      • If the shipping company is not able to locate the missing items, we will ship those items via standard ground shipping to you at no charge if the receipt was noted as short and the items that are missing are noted on the delivery receipt.
      • If the shrink wrap is torn or has been replaced during transit, mark the receipt as 'wrap broken'.

    2. Frequently Asked Questions

      Absolutely! MRCOOL mini splits are designed for DIY enthusiasts. They come with pre-charged line sets and easy-to-follow instructions, so you can install them yourself without professional help. However, you might need a licensed electrician to connect the condenser to your electrical panel.

      The breaker size you need depends on the capacity of your MRCOOL unit. Check the specification sheet for your model to find the exact requirements.

      MRCOOL mini splits are built to last. With proper maintenance, they can keep you comfortable for 15-20 years.

      MRCOOL offers one of the best warranties out there. You get a comprehensive 10-year warranty on parts, labor, and the compressor. Plus, if you use their cleaning kit every 6 months and register it each time, you'll qualify for a limited lifetime warranty.

    Got questions? Our friendly sales experts are on standby to chat or answer your call 24/7 🌟

    Chat with Our Team +1 (844) 999-9725

    Watch how it works

    4.8 - based on 24 opinions

    Tim Derflinger

    Verified buyer

    I found the entire experience with MrCool to be easy. The unit arrived in great condition with all the necessary parts. The install was very easy and was not difficult at all.

    Alan Peters

    Verified buyer

    I am a retired residential contractor but someone with some ability with their hands could install this system. It works flawlessly and very quietly.

    Free delivery All US mainland orders

    Free delivery All US mainland orders

    We match prices Fair pricing for everyone

    We match prices Fair pricing for everyone

    Authorized dealer Guaranteed genuine products

    Authorized dealer Guaranteed genuine products

    Free delivery All US mainland orders

    We match prices Fair pricing for everyone

    Authorized dealer Guaranteed genuine products