MRCOOL DIY 5th Generation 12,000 BTU Mini-Split Air Handler + Condenser, 115V

Experience true, all-season comfort delivered through innovation and simplicity. The MRCOOL DIY 5th Generation 12,000 BTU (1-ton) mini-split system combines advanced performance, energy efficiency, and truly do-it-yourself installation to bring premium climate control to your space.

Why This System Stands Out

Full-System, Ready to Install
This package includes both the air handler (indoor unit) and the condenser (outdoor unit), paired with a 25 ft precharged line set filled with R-454B refrigerant—everything you need to set up comfort in one go. 

Key Features & Highlights

High Efficiency Performance

• Delivers 12,000 BTU cooling (and heating) capacity, suitable for rooms, living areas, or spaces up to ~500–550 sq ft. 

• Rated at 23.5 SEER2 for cooling performance, placing energy savings front and center. 

• Variable-speed inverter technology ensures smoother operation, better comfort, and lower energy waste.

True DIY Installation (No Special Tools Required)

• Patented Quick Connect® fittings eliminate brazing or vacuuming. 

• The system is precharged and comes with DIYPRO® communication cable for simple plug-and-play setup. 

• Designed so that even non-professionals can install with confidence—just mount, connect, and power. 

Versatile Climate Control

• Functions in HVAC modes: cooling, heating, auto, dry, fan, and sleep mode.

• Equipped with “Follow Me” mode so the system tracks temperature from the remote to match personal comfort zones.

• Built to work reliably across a range of conditions—heating capabilities even in colder weather, and efficient cooling when ambient temperatures rise.

Quiet & Durable Build

• Indoor units operate quietly to maintain a peaceful environment.

• Outdoor condenser features corrosion-resistant coatings to protect against weather, moisture, and coastal conditions.

• Diagnostics, auto-restart, and leak detection features help maintain system health and longevity.

Ideal Use Cases

This 12,000 BTU system is ideal for:

• Medium-sized rooms, open-plan living areas, or apartments

• Homes where ductwork is impractical or too expensive to install

• Retrofits, additions, or spaces needing dedicated HVAC

• Areas with moderate heating demand, where the heat pump system can carry most of the heating load

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