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MRCOOL DIY® 5th Gen OuttaSight® 12K BTU Ceiling Cassette | R-454B - DIYCASSETTE12HP-230D25-O
Summary
The 5th Generation MRCOOL® DIY® OuttaSight® 12K BTU Ceiling Cassette delivers powerful, discreet climate control for spaces up to 550 sq. ft. Featuring the same innovative low-profile design (only 8.98" height) as its 6K counterpart but with increased capacity, this ultra-quiet (24-41 dBA) cassette features R-454B compatibility, advanced filtration, and smart controls via app or voice commands. With its flush-mount design for standard 16" joist spacing and simplified DIY installation (no vacuuming required), this ceiling cassette combines high performance with space-saving elegance.
Important
Designed for DIY installation between standard 16" ceiling joists. Requires compatible MRCOOL DIY condenser and Quick Connect® line set (sold separately). Registration required for Limited Lifetime Compressor warranty. Not available in Guam, Puerto Rico, or Virgin Islands.
What's Included
- 12K BTU Ceiling Cassette (Model DIYCASSETTE12HP-230D25-O)
- Wireless Remote Control
- Installation Hardware
- Installation Manual
- User's Manual
- Warranty Information
Key Features
- High-Capacity 12K BTU - Covers up to 550 sq. ft.
- True DIY Installation - No specialized tools or HVAC technician required
- Low-Profile Design - Fits between 16" ceiling joists (only 8.98" height)
- Ultra-Quiet Operation - 24-41 dBA range (37 dBA rated)
- Smart Controls - Works with SmartHVAC app, Alexa & Google Assistant
- Advanced Filtration - Improves indoor air quality
- Elevation Function - Lowers panel for easy filter access
- Two-Stage DC Motor - Variable-speed operation (797-1075 RPM)
- R-454B Refrigerant Compatible - Eco-friendly and efficient
- Five-Speed Airflow - 177 to 353 CFM
Complete Technical Specifications
| SKU | DIYCASSETTE12HP-230D25-O |
| UPC | 840255587518 |
| Cooling Capacity | 12,000 BTU |
| Coverage Area | Up to 550 sq. ft. |
| Refrigerant | R-454B (compatible) |
| Electrical | 208-230V 1 Phase 60 Hz |
| Electrical Details | 3A Min Circuit Ampacity, 15A Max Fuse Breaker |
| Noise Level | 24-41 dBA (37 dBA rated) |
| Airflow (CFM) | 177 / 247 / 283 / 312 / 353 (5 speeds) |
| Blower Motor | Two-Stage DC (797-1075 RPM) |
| Line Connections | 1/4" Liquid Line, 3/8" Suction Line |
| Net Dimensions (HxWxD) | 8.98" x 50.31" x 13.19" |
| Net Weight | 45 lbs |
| Shipping Dimensions | 22.64" x 57.6" x 22.48" |
| Shipping Weight | 88 lbs |
Performance Features
| Smart Controls | SmartHVAC App, Alexa, Google Home, Wireless Remote |
| Operation Modes | Cool, Heat, Fan, Dry, Auto |
| Special Features | Quiet Mode, Sleep Mode, Auto Cool, Fan Only Option |
| Connectivity | WiFi, iOS & Android Compatible |
| Installation | Fits standard 16" joist spacing (including I-joists) |
Warranty Information
- Limited Lifetime Compressor Warranty - With product registration
- 7 Year Compressor Warranty - Base coverage
- 5 Year Parts Warranty
- Registration required within 60 days of installation
Manuals & Downloads
- Product Brochure
- Installation & Owner's Manual
- Remote Control Manual
- Service Manual
- Warranty Registration
Safety Information
PROPOSITION 65 WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
High-Capacity Ceiling Cassette Design
The OuttaSight® 12K BTU ceiling cassette maintains the same revolutionary 8.98" low profile as its 6K counterpart while delivering double the coverage capacity (550 sq. ft.). The unit's innovative design fits perfectly between standard 16" ceiling joists, including pre-manufactured I-joists, maintaining a clean, flush appearance while delivering powerful climate control. The Elevation function allows the front panel to lower for effortless filter access and maintenance. With five-speed airflow (177-353 CFM) and precise temperature control, this high-capacity cassette provides customized comfort without compromising ceiling aesthetics.
Smart Control & Ultra-Quiet Performance
Control your 12K BTU cassette through multiple options: the included wireless remote, SmartHVAC app for iOS/Android devices, or voice commands via Amazon Alexa/Google Assistant. The two-stage DC motor operates at whisper-quiet levels as low as 24 dBA - quieter than most conversation. Special modes include Sleep Mode for nighttime comfort, Quiet Mode for minimal sound output (24 dBA), and Auto Cool for automatic temperature maintenance. The advanced filtration system captures airborne particles while remaining easily accessible for cleaning via the lowering front panel.
Simplified DIY Installation
Designed specifically for homeowner installation, this 12K ceiling cassette works with MRCOOL's revolutionary Quick Connect® line sets (sold separately) that eliminate the need for vacuuming or refrigerant handling. The compact design fits in spaces where traditional cassettes cannot, including areas with pre-manufactured I-joists. Electrical connection is simplified with standard 208-230V wiring (3A min circuit ampacity). The complete DIY system can be installed without special tools or HVAC expertise, saving significant installation costs while delivering professional-grade performance at 12,000 BTU capacity.
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We will prepare your order within 24 hours if it’s received on a weekday (before noon). Orders are shipped in one to two business days. Transit time is between 3 to 6 business days, although exceptions apply. We email tracking information once your purchase is shipped.
Delivery Map
IMPORTANT DELIVERY INFORMATION: Please be kindly informed that this air conditioner, due to its weight and shipping restrictions, is shipped palletized with an arranged freight service and requires an appointment for delivery. To AVOID delays, please check if the provided phone number in the order details is a current number where you can be reached. You can also contact the carrier directly and refer to your tracking number to set up a date and time for your appointment. It is your responsibility to ensure a safe and secure environment for delivery. Please note that we cannot be held liable for any packages that are stolen or lost after delivery has been confirmed. PLEASE verify your shipping address, as changes to the address after freight has shipped can result in an additional 15% or higher fee depending on freight weight and dimensions.
SMALLWARES INFORMATION: Please be informed that for smaller items, such as Installation Kits, Smart Connectivity Dongles, and TTW Sleeves, when these items are ordered individually, they may be shipped via FedEx without a signature requirement. It is your responsibility to ensure a safe and secure environment for delivery. Please note that we cannot be held liable for any packages that are stolen or lost after delivery has been confirmed. Thank you for your understanding and cooperation.
INSPECT YOUR MERCHANDISE BEFORE SIGNING: Please inspect your boxes thoroughly when you receive them. They should arrive shrink-wrapped and on a pallet. If you notice any damages or imperfections (e.g. crushed box or forklift hole), please write comments on the receipt before signing for delivery, no matter how small damages seem. Contact us immediately to assist you.
Shipping & Delivery
We will prepare your order within 24–48 hours if it’s received on a weekday (before noon). Orders are shipped in one to two business days. Transit time is between 3 to 6 business days, although exceptions apply. We email tracking information once your purchase is shipped.
Delivery Map
IMPORTANT DELIVERY INFORMATION
Please be informed that this air conditioner, due to its weight and shipping restrictions, is shipped palletized with an arranged freight service and requires an appointment for delivery.
To AVOID delays, please make sure the phone number in your order details is accurate and one where you can be reached. You may also contact the carrier directly using your tracking number to schedule your delivery.
It is your responsibility to ensure a safe and secure delivery environment. We are not liable for any packages that are stolen or lost after delivery is confirmed.
Please verify your shipping address carefully. Changes to your shipping address after the freight has been shipped may result in additional fees of 15% or more, depending on freight weight and dimensions.
SMALLWARES INFORMATION
Smaller items such as Installation Kits, Smart Connectivity Dongles, and TTW Sleeves may be shipped via FedEx without a signature requirement if ordered individually.
It is your responsibility to ensure a safe delivery location. We are not liable for packages lost or stolen after delivery confirmation. Thank you for your understanding and cooperation.
INSPECT YOUR MERCHANDISE BEFORE SIGNING
Please inspect your boxes carefully upon delivery. Shipments should arrive shrink-wrapped and on a pallet. If you notice any damage or signs of mishandling (such as a crushed box or forklift puncture), write comments on the delivery receipt before signing, even if the damage appears minor.
Contact us immediately if any issues arise so we can assist you promptly.
SMS Delivery Notifications
If you opted into SMS notifications, we may send you order updates or delivery reminders by text message. Message frequency may vary. Message and data rates may apply. Text STOP to opt out. Text HELP for assistance.
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