MRCOOL DIY Hyper Heat 12K Ceiling Cassette Mini Split System Bundle — 5th Gen

The MRCOOL® DIY Hyper Heat 12K Ceiling Cassette Bundle delivers true cold-climate comfort with professional HVAC performance and DIY installation.
This system includes the DIYHH-12-HP-C-230D25-O 12,000 BTU Hyper Heat condenser, the DIYCASSETTE12HP-230D25-O OuttaSight ceiling cassette, AND a pre-charged DIY® QuickConnect® line set—no vacuum pump, no gauges, no refrigerant handling.
 
Full DESCRIPTION
The MRCOOL® DIY Hyper Heat 12K Ceiling Cassette Mini Split Bundle is the most advanced ductless DIY heat pump ever released. It provides full heating capacity down to -22°F, delivering year-round comfort in climates where traditional mini splits or space heaters fail.
 
Unlike standard mini splits, the Hyper Heat platform maintains heat output in extreme winter conditions. The high-efficiency DC inverter compressor, paired with the new R-454B refrigerant, unlocks 23.5 SEER2 cooling, 10 HSPF2 heat, and whisper-quiet operation. This bundle is designed specifically for DIY homeowners: no EPA certification, no vacuum pumps, no refrigerant tools.
 
The included DIY® QuickConnect® pre-charged line set installs rapidly using threaded fittings. The refrigerant is sealed at the factory—just tighten connections, mount the system, and power it on.
 
The OuttaSight® 12K one-way ceiling cassette mounts fully flush between 16” ceiling joists, preserving your wall space and delivering a high-end commercial look. Unlike wall mounts, the cassette features a built-in condensate pump, which solves gravity drain limitations and allows installation where wall handlers cannot drain.
 
Control your system however you like:
Wireless remote
SmartHVAC App (iOS / Android)
Amazon Alexa
Google Assistant
Smart program schedule & dew-humidity modes
 
Built to last, the outdoor condenser uses Gold Fin® anti-corrosion coating and is backed by MRCOOL’s industry-leading coverage: 7-year compressor warranty, 5-year parts warranty, plus limited lifetime replacement through MRCOOL® Care.
 WHY CHOOSE HYPER HEAT
Most mini splits lose heat output below 20–30°F.
Hyper Heat maintains full performance down to -22°F.
✔ Standard mini split → Good for moderate climates
✔ Hyper Heat → Engineered for cold climates and real winter use
If you live in:
Kentucky
Tennessee
Midwest
Mountain states
Northeast
Northern US / Canada
 Hyper Heat is the correct choice.
 
 Ideal Applications
This system is perfect when aesthetics matter, wall space is limited, or humidity needs controlled. The built-in pump allows ceiling installs where wall handlers or gravity drains fail.
Ideal for:
Bedrooms or guest suites
Home offices and retail spaces
Finished basements & media rooms
Airbnb / short-term rentals
Salons, barbershops, and boutique commercial spaces
Cabins & tiny homes
Attic conversions
Home gyms or spa rooms
Areas up to 550 sq. ft.
Hyper Heat is the right solution when you want comfort, not survival.
 
 WHAT’S INCLUDED (BUNDLE)
✔ DIYHH-12-HP-C-230D25-O — 12K Hyper Heat Condenser
✔ DIYCASSETTE12HP-230D25-O — 12K OuttaSight Ceiling Cassette
✔ Pre-Charged DIY® QuickConnect® Line Set (included)
✔ DIYPRO® Cable (included)
✔ Wireless Remote
✔ SmartHVAC Control Module
✔ Installation hardware & manuals
Line set is factory pre-charged R-454B — no refrigerant tools required.