Mr. Cool DIY 12,000 BTU 5th Gen Multi-Zone One-Way Ceiling Cassette - R454B

MRCOOL® DIYCASSETTE12HP-230D25-O- DIY® OuttaSight® 12K BTU R-454B One-Way Ceiling Cassette Mini-Split Air Handler
The 5th Generation DIYCASSETTE12HP-230D25-O  MRCOOL® DIY® OuttaSight® 12K BTU One-Way Ceiling Cassette delivers quiet, efficient climate control for spaces up to 550 sq ft. Designed for tool-free DIY installation, it fits flush between standard 16” ceiling joists—including pre-manufactured I-joists—for a sleek, space-saving appearance without ductwork or wall units. Ideal for multi-zone systems in both new construction and retrofit projects, it pairs seamlessly with the MRCOOL® DIY® Quick Connect® line set, pre-charged with eco-friendly R-454B refrigerant to eliminate vacuuming. Advanced filtration improves indoor air quality, while the Elevation function lowers the panel for easy filter maintenance. With quiet operation and versatile controls—including a wireless remote, SmartHVAC app, and Alexa/Google Assistant voice integration—this unit delivers customizable comfort. Backed by a limited lifetime warranty, plus 7-year compressor and 5-year parts coverage, it offers long-term reliability and year-round performance.

General Information
System Type: One-way ceiling cassette mini-split air handler
Model:

DIYCASSETTE12HP-230D25-O MRCOOL® DIY® OuttaSight® 12K BTU
Capacity: 12,000 BTU Cooling / Heating (year-round comfort)
Room Size: Up to 550 sq ft
Operating Modes: Heating & Cooling
Refrigerant: R-454B (pre-charged Quick Connect® line set compatible)

Key Features
Flush-Mount Design: Fits between 16” joists, including I-joists, for a discreet ceiling install
DIY Installation: No specialized tools required; perfect for new or retrofit projects
Eco-Friendly Refrigerant: R-454B for reduced environmental impact
Advanced Filtration: Enhances indoor air quality
Easy Maintenance: Elevation function lowers panel for filter access
Smart Controls: Remote, app, and voice control via Alexa & Google Assistant
Quiet Operation: Maintains a peaceful indoor environment
Warranty Protection: Limited lifetime warranty, 7-year compressor, 5-year parts

Included Components

DIYCASSETTE12HP-230D25-O - MRCOOL® DIY® OuttaSight® 12K BTU ceiling cassette
Wireless remote control

Ideal For
Medium-sized rooms, offices, or other areas needing discreet, efficient heating and cooling without wall-mounted units or ductwork. Perfect for DIY installers seeking professional performance with smart convenience.