ClickCease MRCOOL DIY Mini-Split Single-Zone – FrosthubUSA

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MRCOOL DIY Mini Split Single-Zone w/ 25ft pre-charged line

SKU: DIY-12-HP-WM-115C25

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

Total: $1,954.00

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‏‏‎‎‎‏‏‎*Only when bought through us.


Condenser (x1)

Air Handlers (x1)

25 ft. Line Set (x1)

Remote Control (x1)


The MRCOOL® DIY® SingleZone Series, Energy Star rated, isn't your ordinary home comfort system. Its innovative design transforms our understanding of home cooling and heating. It stands out due to its user-friendly design that empowers even those with no technical background to set up a system for their home.

Central to its effortless installation is the Pre-Charged DIY® Quick Connect Line Set. This feature enables anyone to experience comfort throughout their space without resorting to a specialist's service.

What's more, these line sets come already charged with the environmentally friendly R-410A refrigerant, removing the typical hassles tied to such tasks. They're designed to resist kinks and are leak-proof, available in a range of lengths for diverse requirements. With the Quick Connect® valves, getting started is as uncomplicated as attaching a light bulb.

Yet, the MRCOOL® DIY® SingleZone Series isn't just about installation simplicity. It's a symbol of effective performance and top-tier quality. The system proudly showcases commendable EER and SEER ratings, allowing homeowners to guarantee unmatched comfort throughout their space.

Embedded in its quality assurance is the Gold Fin® Condenser. This element not only promises superior performance but also stands as a symbol of durability, offering homeowners a lasting peace of mind.

In today's tech-driven era, the DIY Pro® Cable & SMART HVAC CONTROLLER® ensure homeowners stay in the driver's seat. The ease of integrating with smart home devices is unparalleled, made even more convenient with the "JUST ASK" functionality, supporting voice-operated commands. The Follow Me® attribute adds another layer to the user-centric design. Instead of generalized settings, this feature adapts based on the user's actual position, serving tailored comfort.

A highlight of the MRCOOL® DIY® SingleZone Series is its Low Ambient Cooling capacity. Irrespective of outside conditions, it pledges unwavering cooling, ensuring households always feel like sanctuaries of solace.

Among its myriad features, such as the DIY Pro™ Cable, smartphone app connectivity, DC Inverter, leak detection, and the previously mentioned Follow Me® feature, every aspect of the MRCOOL® DIY® system is meticulously crafted to solidify its status as the pinnacle of home comfort solutions.

For this exceptional product, its dimensions and mass are model-dependent. Those curious for more intricate details can consult the specification sheet provided below. All data shared here is valid as of March 28, 2023.

For both admirers and doubters, deeper insights into the unique patented functionalities of this game-changing product await at MRCOOL's Patent Page. This isn't just an evolutionary step; it's a full-scale revolution in the HVAC domain.

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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 Single-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

📑 Single-Zone AHRI Certifications: 12K BTU - 18K BTU - 24K BTU - 36K BTU

📑 Single-Zone Energy Guide Certifications: 12K BTU - 18K BTU - 24K BTU - 36K 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.

Payment methods

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We never store your credit card number and your payment is secure, always ensuring privacy, integrity, safety & confidence.

  • 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.