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∼7yr Compressor∼
5yr Parts Warranty∼
MR COOL TECH SUPPORT: 270-366-0457
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The MRCOOL DIY 5th Generation 12,000 BTU heat pump is the market's most popular DIY mini split for a reason: it ships with a pre-charged, pre-cut line set that eliminates the need to hire a licensed HVAC technician for installation. If you can run a drill and follow an instruction manual, you can have this system cooling or heating within a day. It's designed for spaces between 400 and 600 sq ft — bedrooms, detached offices, garages, sunrooms, and bonus rooms — running on standard 115V/120V power (same outlet type as a standard dryer circuit).
Efficiency and performance specs for the 5th Gen: 23.5 SEER2 (Energy Star certified), 12.5 EER, 10.2 HSPF, R454B low-GWP refrigerant, minimum operating temperature of -13°F for heating, maximum heating capacity of approximately 13,500 BTU, built-in Wi-Fi with smartphone app control and Amazon Alexa/Google Home voice compatibility. The 5th Gen upgrade over 4th Gen brings R454B refrigerant compliance (required for new installs in increasing states as of 2025), improved SEER2 ratings, and refreshed app interface.
At Mini Split Warehouse, you get the same MRCOOL DIY unit available at big-box stores, plus a team that actually answers the phone when you have an installation question. Our free nationwide shipping means no $200 delivery surcharge for a heavy unit. Factor in our 3% cash/check/Zelle discount and you're looking at a delivered price around $2,157 — and no installer invoice showing up two weeks after delivery.
Upgrade your space with the 5th Generation MRCOOL® DIY® 12K BTU Ductless Heat Pump Single Zone Mini-Split Air Handler. This system is designed for straightforward, tool-free installation, with no special skills required, and provides efficient heating and cooling for areas up to 550 sq. ft. The pre-charged 25-foot DIY® QuickConnect® line set, filled with R-454B refrigerant, eliminates the need for vacuuming, saving you time, effort, and installation costs.
Plus, the included DIYPRO® cable enhances durability by removing the need for electrical conduit, protecting against outdoor elements and wildlife. Take control your way—whether with the wireless remote, the SmartHVAC app for Apple and Android, or hands-free voice commands via Amazon Alexa and Google Assistant. The Gold Fin® Condenser also provides enhanced corrosion resistance, making it an excellent choice for coastal environments.
Designed with your comfort in mind, the system’s wireless remote features Follow Me technology, allowing the air handler to adjust based on the remote’s location for personalized comfort. Dry Mode adds another layer of convenience by reducing humidity and preventing excess condensation. With industry-leading warranties, including a limited lifetime warranty, a 7-year compressor warranty, and a 5-year parts warranty, you can trust in long-lasting performance. Experience an easier installation, smart technology, and year-round comfort with the 5th Generation MRCOOL® DIY®.
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Special Features Include:
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QUICK CONNECT With our patented, simple quick connect lines you'll be able to install your MRCOOL® DIY® without needing specialized training or expensive tools
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DIYPRO® ARMORED CABLE Future-proof your investment with the included DIYPro® cable, eliminating the need for electrical conduit.
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CORROSION RESISTANT
Live on the coast? Don't worry, our condenser features Gold
Fin® condensers built to resist long term corrosion.
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FOLLOW ME® FUNCTION
Keep the included remote close by, and MRCOOL DIY® will track the air temperature around you to ensure maximum comfort.
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SMARTPHONE APP
Control your MRCOOL® DIY® anywhere with your Apple or Android smart device and an internet connection.
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LOUVER POSITION MEMORY
The air handler's horizontal louver will
automatically reset to the same position that was set the last time the unit was
powered on.
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DIGITAL ASSISTANT READY The MRCOOL® Smart HVAC Controller® Module and App fully support Google Assistant & Amazon Alexa out of the box.
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AUTO RESTART
Power outage? No worries…the MRCOOL® DIY® auto restart will
have the unit running again in no time
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LOW AMBIENT COOLING & HEATING (-13F/-13F) Cool and Heat all the way down to -13°F This feature makes the MRCOOL DIY the ideal system for server rooms, greenhouses, and any other application that requires cooling all year.
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Take full control of your home comfort with the 5th Generation MrCool DIY Mini Split System. Homeowners can easily install this outdoor heat pump condenser and indoor air handler since installation requires no special tools, equipment, or training. This full heating and cooling system can be installed in just a few hours.
The key to the 5th Generation MrCool DIY Ductless Heat Pump Mini Split System's easy installation capability is the pre-charged Quick Connect line set — MrCool's cutting-edge technology that makes setup safe, simple, and cost effective. The line set uses the environmentally friendly, and chlorine-free refrigerant R-454B, which is an alternative to old refrigerant that won't damage the ozone layer.
