MRCOOL DIY Hyper Heat 12K Complete Mini-Split System

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