ClickCease MRCOOL DIY Mini-Split 2-Zone (36,000 BTU: 18K + 18K) only $3327.00 – FrosthubUSA

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MRCOOL DIY Mini Split - 36K BTU 3-Ton 2-Zone (18K + 18K) Ductless AC and Heat Pump w/ pre-charged lines

SKU: DIY-B-236HP1818

Other options: 1 ZONE | 2 ZONES | 3 ZONES | 4 ZONES | 5 ZONES

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Condenser (x1)

Air Handlers (x2)

Lines Set (x2)

Remote Controls (x2)


The MRCOOL® DIY® 36K BTU 3-Ton 2-Zone (18K + 18K) 4th Gen Ductless Mini-Split AC and Heat Pump is not just any home comfort solution. With its patented design, it has redefined the way we think about home cooling and heating. What makes it truly unique is its user-friendly design which allows even those without technical expertise to install a whole-home system themselves.

At the heart of its ease of installation is the Pre-Charged DIY® Quick Connect Line Set. This ensures that anyone can have multi-room comfort in up to 5 zones, without the need for a professional.

Moreover, these line sets, accurately pre-charged with eco-safe R-410A refrigerant, eliminate the complexities usually associated with such installations. They are kink-resistant and leak-proof, available in various lengths to suit every need. With their Quick Connect® valves, setup is as simple as screwing on a light bulb.

But the MRCOOL® DIY® MultiZone Series isn't just about ease of installation. It's also a testament to efficiency and quality. The system boasts impressive EER and SEER ratings. Depending on the specific model, homeowners can choose a heat pump condenser that caters to 2, 3, 4, or even 5 zones, guaranteeing optimal comfort in every corner of their dwelling.

The Gold Fin® Condenser encapsulates the commitment to quality. This component not only ensures top-notch performance but also guarantees longevity, giving homeowners peace of mind.

In this age of technology, the DIY Pro® Cable & SMART HVAC CONTROLLER® make sure homeowners are always in control. Integration with smart home systems has never been more seamless, especially with the "JUST ASK" feature, allowing voice commands for ultimate convenience. The Follow Me® feature further elevates the user experience. Instead of a static setting, this function allows the system to adjust according to the user's location, delivering personalized comfort.

Another notable aspect of the MRCOOL® DIY® MultiZone Series is its Low Ambient Cooling. Regardless of external conditions, it promises consistent cooling, ensuring homes remain havens of comfort.

Beyond the major features, there are a multitude of additional functionalities, from the DIY Pro™ Cable to smartphone app integration, DC Inverter, leakage detection, and the aforementioned Follow Me® function. Each one is designed to make the MRCOOL® DIY® system the ultimate solution for home comfort.

The dimensions and weight of this remarkable product will depend on the chosen model. Those who wish to delve deeper into the specifications can refer to the speficication sheet below. All information presented here is accurate as of March 28, 2023.

For enthusiasts and skeptics alike, more details on the unique patented features of this product can be discovered on MRCOOL's Patent Page. This product isn't just a leap; it's a revolution in the HVAC market.

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Customer Reviews

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Air Handler Guide: Coverage & Matching

Always calculate the BTU of your air handler (AH) based on the square footage of each zone where you intend to install one.

9,000 BTU (AH) covers 375 square feet.
12,000 BTU
(AH) covers 550 square feet.
18,000 BTU
( AH) covers 800 square feet.
24,000 BTU
(AH) covers 1,050 square feet.
36,000 BTU
(AH) covers 1,550 square feet.

Understand Your Mini-Splits System: Here's How BTU Limits Work.

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

Here's how it works: Let's say the condenser can handle 18,000 BTU, and you have two indoor air handlers, each at 12,000 BTU. If you run them both simultaneously, they'll automatically drop down to 9,000 BTU each. They do this to match the condenser's 18,000 BTU limit, ensuring everything runs safely.

If you plan to run only one air handler at a time, a lower BTU condenser might be fine. But if you plan to run all of the air handlers together, you might want to opt for a higher BTU condenser. This way, you can enjoy the full power of each air handler without overloading the system.

HVAC Performance & Specification Sheet

Heating Performance: The DIY mini-split can heat at 100% capacity at – 5 degrees Fahrenheit, even with outdoor temperatures as low as -13 degrees Fahrenheit.

Cooling Performance: The DIY mini-split can cool at 100% capacity with outdoor temperatures as high as 122 degrees Fahrenheit.

Dry Mode: The operating range is from 32°F to 122°F.

Note: If the air conditioner runs for an extended time in cooling mode in high humidity (above 80%), water droplets may form and drip from the unit. To prevent this, adjust the vertical airflow louver to its maximum angle (pointing downwards) and switch to high fan mode.

Warranty & Manuals

All DIY® 4th gen systems have a *LIMITED LIFETIME compressor warranty, 7-year replacement, and 5-year parts warranty for the original owner.

To qualify for the limited lifetime warranty, purchase the mrcool cleaning kit ($117) twice a year, clean your mini-splits and register it on the official MRCOOL website once the cleaning is done.

📑 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

Often Asked Questions

  1. Does MRCOOL Mini Split qualify for tax credit? 
    Only the MRCOOL DIY Mini Split systems in the single zone and multizone 18,000 - 27,000 BTU range qualify for rebates. For detailed information on rebates and incentives, visit the MRCOOL Rebate Center at This will guide you on the available savings for these specific systems.

  2. How does a MRCOOL mini split work?
    A MRCOOL mini split transfers heat between indoor and outdoor units using refrigerant, offering ductless heating and cooling. With DC inverter technology, the compressor adjusts its speed based on heating or cooling needs, ensuring precise temperature control, better energy efficiency, and extended system lifespan.

  3. What is the difference between MRCOOL DIY and Advantage?
    MRCOOL DIY systems are designed for DIY installation, while Advantage systems require professional installation. Additionally, DIY systems typically have higher SEER ratings and more advanced features.

  4. Are MRCOOL mini splits really DIY?
    Yes, MRCOOL mini splits are designed for DIY installation, featuring pre-charged refrigerant lines and quick-connect systems for ease of setup. They do not require an HVAC technician for installation or vacuuming the lines, making the process more accessible and cost-effective for homeowners.

  5. Does MRCOOL Mini split heat well?
    Yes, MRCOOL Mini Splits are designed to provide efficient heating in addition to cooling, making them suitable for year-round comfort. The DIY Mini-Split can heat at 100% capacity at -5 degrees Fahrenheit and maintain effective heating even with outdoor temperatures as low as -13 degrees Fahrenheit, ensuring consistent performance in extreme conditions.

  6. Is MRCOOL DIY reliable? 
    Yes, their systems are renowned for reliability, backed by strong customer reviews and extensive warranties: 5 years on parts, 7 years on the compressor, and a lifetime compressor warranty with biannual use of the recommended cleaning kit. This underscores the brand's dedication to quality and customer contentment.

  7. Where are MRCOOL mini splits made?
    All their systems are designed and assembled in the United States, using components from around the world.

  8. How long does it take to install a MRCOOL DIY mini split?
    The installation time for a MRCOOL DIY mini split may vary, but typically, it can be completed within a day by a competent DIYer.

  9. How much should I expect to pay for a MRCOOL DIY mini split?
    The cost of a MRCOOL DIY mini split system starts between $2,000 and $5,000, and can increase with system capacity, features, and the addition of more zones.

  10. Where to buy a MRCOOL DIY mini split?
    It can be purchased through various online retailers, HVAC suppliers, and home improvement stores. By choosing to buy from us, at, you'll benefit from our 24/7 customer support and 48-hour emergency technical assistance, ensuring prompt help when you need it most. This level of support is a significant advantage over purchasing from other sellers, where you might wait months to receive technical assistance.

Optional Add-on Items

Protect your AC system with the MRCOOL®  Line Set Cover.
The MRCOOL Line Set Cover spans three 4ft sections, totaling 12ft. Exclusively designed for a single line set, its robust design guards against environmental impacts and can be painted in your preferred color for a polished look.

Mount your condenser securely with the MRCOOL® Wall Bracket.
This bracket is the perfect solution for securely and safely mounting your condenser unit to the wall, freeing up valuable space on the ground and providing added protection against potential damage. Not suitable for the 48K condenser.

Keep your DIY system clean with the MRCOOL® Cleaning Kit.
To be eligible for the Limited Lifetime Warranty, ensure you clean your system every six months and register it on the MRCOOL official website.

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  • Multi-Zone

    Multi-zone technology gives you flexibility and control whenever and wherever you want it.

  • 5 Zone Options

    Now you'll be able to heat and cool up to 5 rooms at a time with the MRCOOL® DIY® 5 Zone Multi-Zone unit.

  • R-410 Quick Connect® Line Set

    Available in 16', 25', 35', and 50' options, pre-charged linesets enable easy installation of this ductless system.

  • NEW DIYPRO™ Cable

    The included DIYPro™ Cable eliminates the need for electrical conduit, providing more safety, higher mechanical protection, and durability.

  • Follow Me® Function

    Keep the remote close by, and MRCOOL DIY® will track the air temperature around you to ensure you receive maximum comfort.

  • Leakage Detection

    When the MRCOOL DIY® detects low coolant, an alarm sounds to prevent compressor damage and maintain air comfort.

  • Cooling Down to 5°F

    This feature makes the MRCOOL DIY® the ideal system for server rooms, greenhouses, and any other application that requires cooling all year.

  • Auto Restart

    Power outage? Don’t worry, the MRCOOL DIY®auto restart will have the unit running again in no time at all.

  • Sleep Mode - 24-Hour Comfort

    We made Sleep Mode easy to program to save money, and let you sleep a little easier.

  • Louver Position Memory

    Horizontal louver will automatically move to the same position as you set last time the unit was turned on.

  • Gold Fin® Condenser

    Live on the coast? Don’t worry, our condenser is built to resist long term corrosion.

  • Google Assistant & Amazon Alexa

    The new MRCOOL® Smart HVAC Controller® Module and App fully support Google Assistant & Amazon Alexa out of the box.

  • Best Warranty in the Business

    All DIY® systems have a LIMITED LIFETIME compressor warranty, 7-year replacement, and 5-year parts warranty for the original owner.