MRCOOL DIY 12K Hyper Heat Ceiling Cassette Mini Split System – 23.5 SEER2, -22°F Heating, Pre-Charged Line Set

MRCOOL® DIY Hyper Heat 12K Ceiling Cassette Mini Split Bundle

Cold-Climate DIY Heating & Cooling Up to 550 Sq. Ft.

The MRCOOL® DIY Hyper Heat 12K Ceiling Cassette Bundle delivers true cold-climate comfort with professional HVAC performance and homeowner-friendly DIY installation. This all-in-one mini split system provides efficient heating and cooling down to -22°F while keeping your walls clean with a premium flush-mount ceiling cassette.

This bundle 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, and no refrigerant handling required.

Key Features

• 12,000 BTU Hyper Heat for spaces up to 550 sq. ft.
• Full heating capacity down to -22°F for true cold-climate performance
• Flush-mount ceiling cassette installs between 16" joists — no wall unit needed
• Pre-charged DIY® QuickConnect® line set — no vacuum pump or gauges
• High-efficiency DC inverter compressor with 23.5 SEER2 and 10 HSPF2
• Built-in condensate pump in the cassette — no gravity drain limitations
• Quiet operation: 24–41 dBA
• Control via wireless remote, SmartHVAC® app, Amazon Alexa, or Google Assistant
• Gold Fin® anti-corrosion coating for long-lasting outdoor durability

What's Included

• DIYHH-12-HP-C-230D25-O — 12K Hyper Heat Outdoor Condenser
• DIYCASSETTE12HP-230D25-O — 12K OuttaSight® Ceiling Cassette (one-way)
• Pre-Charged DIY® QuickConnect® Line Set with R-454B refrigerant
• DIYPRO® Cable
• Wireless Remote Control
• SmartHVAC® WiFi Control Module
• Installation hardware, mounting template, and manuals

ℹ️ Line Set Length Info

This system includes a standard 25 ft. line set. Extended line set options add an additional line set, couplers, and a longer control wire for installations requiring extra distance.

Technical Specifications

Control Options

• Wireless remote control
• SmartHVAC® app for iOS & Android
• Amazon Alexa voice control
• Google Assistant voice control
• Programmable timer, Auto mode, Sleep mode, and dehumidification modes

Warranty

• 7-Year compressor warranty
• 5-Year parts warranty
• Limited lifetime compressor replacement with MRCOOL® Care

Frequently Asked Questions

Does this bundle include the line set?
Yes. The QuickConnect® pre-charged line set is included.

Do I need a vacuum pump or gauges?
No. The line set is factory sealed and pre-charged with R-454B.

Can the ceiling cassette be mounted on a wall?
No. It is designed as a ceiling-only unit that mounts between 16" joists.

Does the cassette have a drain pump?
Yes. The ceiling cassette includes a built-in condensate pump.

Can I install this system myself?
Yes. This MRCOOL® DIY system is specifically engineered for homeowner installation without specialized HVAC tools.