MRCOOL DIY 4th Gen 12k BTU Mini Split: Energy Star Efficiency

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Updated on . 5 minute read

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    The new MRCOOL DIY 4th Generation 12k BTU Mini Split is the ultimate heating and cooling solution, offering top-notch energy efficiency for your home. Perfect for single zone areas like home offices and bedrooms, ideally covers up to 500 sq ft. Let's dive into the specifics that make this system a must-have for any homeowner.

    MRCOOL 4th Gen 12K BTU Advanced Features

    • Certified Efficiency: Energy Star certification confirms its place among the most efficient units available.
    • Superior Energy Savings: Boasting a SEER rating up to 22.5, this mini split promises considerable reductions in energy bills.
    • Quick and Easy Install: Pre-charged Quick Connectors cut down installation time significantly.
    • Corrosion Resistance: A Gold Fin Condenser Coating means your investment is protected for the long haul.
    • Remote Climate Management: With smart controls, adjust your settings from anywhere using MRCOOL's HVAC controller, Android apps, Google Assistant, or Amazon Alexa.
    • Hand-Held Remote Control: The MRCOOL DIY 4th Generation Mini Split comes with a hand-held remote control for ease of use that allows for convenient temperature adjustments anytime you want.
    • Unmatched Warranty: Offering the best warranty in the industry. All MRCOOL DIY 4th gen systems have a *LIMITED LIFETIME compressor warranty, 7-year replacement, and 5-year parts warranty for the original owner. It's important to note that proper registration of your unit is necessary to avail of the limited lifetime warranty.

      Also, 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.

    Easy DIY Installation with MRCOOL DIY 4th Gen

    If you're planning to install the MRCOOL DIY 4th Generation Mini Split, you'll be happy to know that it's designed for easy DIY installation, thanks to the included DIY Pro and pre-charged quick connect line set.

    The MRCOOL 12K BTU single zone mini split comes with a standard 25 ft line set that caters to most needs. If you need a longer line, you have options. You can purchase another line set for your desired length or buy extra line sets and a coupler kit to connect them. You can connect 2-3 line sets with a maximum length of 75 ft. If 25 ft is just too long, no worries; you can coil the excess at the back of the condenser without any issues. Please note, only in multi-zone units can you choose your desired length of line set for each air handler.

    Consistent Comfort in Any Condition

    Regardless of the climate, the MRCOOL 4th Gen Mini Split delivers:

    • Heating Capabilities: It performs optimally with heat output maintained even at temperatures as frigid as -15°F.
    • Cooling Proficiency: It cools reliably in extreme heat, capable of handling up to 122°F.

    Electrical Specifications Overview

    For those who need to know the electrical demands, here’s what the 4th Gen Mini Split requires:

    • Power Supply: It's compatible with 115V (for 12,000 BTU models) and 208-230V (for 18,000 to 36,000 BTU models), accommodating various home electrical systems.
    • Circuitry: The minimum circuit ampacity (outdoor) is 19 Amp for 12k BTU, 18 for 18k BTU, 22 for 24k BTU, and 28 Amp for 36k BTU, ensuring safe operation within your home's electrical capacity.
    • Protection: The maximum fuse (breaker) sizes protect the unit, ranging from 25 Amps for 12k BTU, 30 Amps for 18k BTU, 35 Amps for 24k and 36k BTU.


    In conclusion, the MRCOOL DIY 4th Generation 12k BTU Mini Split offers a revolutionary solution for home heating and cooling. With its Energy Star rating, advanced features, and easy DIY installation, it provides unparalleled efficiency and convenience. Enjoy long-term comfort and peace of mind with its durable design and corrosion resistance. Plus, the unmatched warranty coverage solidifies its position as a top choice in the industry. Experience consistent comfort in all conditions and embrace the future of home climate control with the MRCOOL 4th Gen Mini Split.


    Q: Are MRCOOL mini split reliable?

    A: Is MRCOOL a trusted and reliable HVAC appliance brand? Absolutely! MRCOOL is routinely one of the best-reviewed and most popular HVAC brands on the market. Hundreds of thousands of consumers have installed a MRCOOL unit in their homes without needing to have a technician come out.

    Q: How many BTU do I need for a 25x20 room?

    A: For a 25x20 room, you'd need around 12,000 BTU to effectively cool it.

    Q: What happens if you oversize a mini split?

    A: An oversized mini split will cycle on and off frequently, reducing its lifespan. It will also remove too much humidity from the air, making the space uncomfortable.

    Q: What is the average cost of a MRCOOL 4TH GEN 12000 BTU mini split?

    A: The average cost ranges from around 1800-2000 USD. For an additional 5% discount and FREE Shipping, visit the top MRCOOL dealer to purchase now.

    Q: Does MRCOOL plug into wall outlet?

    A: The unit must be used with a properly grounded wall outlet. If the wall outlet to be used is not properly grounded, protected by a time delay fuse, or a circuit breaker, have a qualified electrician install the proper outlet.

    Q: What is the difference between 3rd and 4th gen MRCOOL?

    A: MRCOOL's new 4th GEN DIY single zone offers increased SEER ratings over their 3rd generation counterparts. The 12K single zone unit boasts a 22 SEER rating. The 12K, 18K, and 24K units come with an Energy Star certification.

    Q: How big of a MRCOOL mini split do I need?

    A: Basic Sizing based on Square Footage alone: 12k BTU = up to 500 square feet, 18k BTU = 450 to 750 square feet, 24k BTU = 700 to 1000 square feet, and 36k BTU is for 1200-1500 square feet.

    Q: Is MRCOOL made in the USA?

    A: Yes, all MRCOOL products are proudly designed, created, and manufactured in the USA, with the Headquarters and Warehouse located in Kentucky.

    Q: Does MRCOOL come with electrical wiring?

    A: Yes, every MRCOOL DIY® includes the 25ft DIYPRO™ armored communication cable to connect the indoor wall-mounted air handler and the outdoor condenser.

    Q: What refrigerant does MRCOOL mini split use?

    A: MRCOOL mini split use eco-safe R-410A refrigerant, which is the new standard for American air conditioners and heat pumps.

    Q: Do you have to pull a vacuum on a MRCOOL mini split?

    A: No charging or vacuuming is required for the MRCOOL DIY series, making installation easier and more convenient.

    Q: Is MRCOOL actually DIY?

    A: Yes, MRCOOL's DIY mini split ductless units are truly designed for DIY installation, making them ideal for homeowners without HVAC experience.

    Q: Can I install a MRCOOL mini split system myself if I have no HVAC experience?

    A: Yes, MRCOOL’s DIY mini split systems are specifically designed for individuals without HVAC experience, featuring easy installation with pre-charged line sets and detailed instructions.

    Get a personalized MrCool sizing consultation today.

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