Introducing The MRCOOL® DIY Hyper Heat 12K Complete Mini-Split System is a revolutionary single-zone heating & cooling solution designed for real homeowners — no vacuum pumps, no gauges, no HVAC license, no refrigerant handling.

You get extreme cold weather performance down to -22°F, 23.5 SEER2 efficiency, and true almost as easy as plug-and-play installation using a 25ft pre-charged QuickConnect® line set. Ideal for 350–550 sq. ft. rooms, garages, bedrooms, offices, ADUs, shops, and more.

 FULL PRODUCT DESCRIPTION

Meet the First Ever DIY Hyper Heat Mini-Split System from MRCOOL®

For the first time ever, MRCOOL® has brought Hyper Heat technology to the DIY mini-split lineup. The DIYHH-12-HP-C-230D25-O condenser delivers 12,000 BTU heating and cooling and maintains powerful output down to -22°F, outperforming standard DIY units and traditional portable heaters.

No vacuuming, no charging, no guesswork—just connect the pre-charged QuickConnect® line set and turn it on.

Paired with the DIY-12-HP-WMAH-230D25-O wall-mounted air handler, this bundle gives you whisper-quiet operation, smart controls, WiFi, Amazon Alexa, Google Assistant compatibility, Dry Mode dehumidification, and a clean, sleek indoor design that fits any room.

True DIY Installation — Save $1,500–$3,000 plus in Labor

This system uses factory-sealed pre-charged refrigerant lines.

No HVAC tools. No nitrogen test. No vacuum pump.

Just install and go.

The included DIYPRO® cable eliminates conduit and provides extra protection from pets, weather, and lawn damage.

Cold Climate Performance You Can Actually Trust

Regular mini-splits lose heat as temps drop.

DIY Hyper Heat is different.

Its inverter compressor and R-454B refrigerant maintain stable output down to -22°F, eliminating the need for electric space heaters or propane.

That means:

✔ Better efficiency

✔ Lower bills

✔ Full comfort in bad winters

✔ Safe all-electric operation

Smart Comfort Anywhere

Control your system your way:

• Remote control
• SmartHVAC app (iOS / Android)
• Amazon Alexa / Google Assistant voice control

Built to Last — Gold Fin® Condenser

Salt air? Polluted areas? Humidity?

No problem.

The corrosion-resistant Gold Fin® coating protects the outdoor condenser and extends lifespan.

 WHAT’S INCLUDED IN THIS BUNDLE

✔ 1 × MRCOOL DIY Hyper Heat 12K Outdoor Condenser – DIYHH-12-HP-C-230D25-O

✔ 1 × MRCOOL 12K Wall-Mount Air Handler – DIY-12-HP-WMAH-230D25-O

✔ 25ft Pre-Charged QuickConnect® Line Set (DIY25-1438 recommended)

✔ DIYPro® communication cable

✔ Remote control

✔ Installation accessories

✔ User manual