What's in the box
- MRCOOL® 9K DIY® OuttaSight® 5th Gen Ceiling Cassette (230V)
- Wireless Remote Control
- Installation Accessories
- MRCOOL® Warranty
Free curbside shipping on eligible MRCOOL® systems across the continental U.S. Most products ship in 3–5 business days and arrive in 4–10 days, depending on your location. Freight carriers will call to schedule delivery.
Returns accepted within 30 days on new, unopened items in original packaging. A restocking fee of up to 35% may apply for HVAC equipment — we’ll always confirm before issuing a return authorization.
Each MRCOOL® system is backed by manufacturer warranty coverage as defined by product and model — typically 5–10 years on major components. Register your system after installation to activate full coverage.
Need help with sizing, voltage or compatibility? Email support@coolheatdirect.com — our U.S. team replies within one business day.
Manuals & documents
MODEL: DIYCASSETTE09HP-230D25-O
Powerful, Discreet Climate Control for Spaces up to 400 sq. ft.
The MRCOOL® DIY® Series 5th Generation OuttaSight® 9K BTU One-Way Ceiling Cassette delivers efficient, whisper-quiet heating and cooling with a low-profile, ceiling-mounted design. Ideal for bedrooms, home offices, and small living areas up to 400 sq. ft., this cassette fits effortlessly between 16” ceiling joists—including I-joists—for a clean, modern appearance.
Designed for easy, DIY-friendly installation, this unit works with the MRCOOL® DIY® Quick Connect® pre-charged line set, filled with eco-friendly R-454B refrigerant, eliminating the need for vacuuming or specialized tools. The DIYPro™ cable adds extra protection against outdoor conditions, pests, and lawn equipment.
Take total control of your indoor climate with multiple options, including the SmartHVAC® app, Amazon Alexa, Google Assistant, or the included wireless remote. Featuring advanced air filtration and a convenient Elevation function for easy filter maintenance, this unit helps improve air quality while maintaining consistent comfort.
Protected by a Gold Fin® corrosion-resistant condenser coating, this cassette is built for lasting performance, even in coastal or high-humidity areas. Plus, it's backed by an industry-leading Limited Lifetime Compressor Warranty, a 7-Year Compressor Warranty, and a 5-Year Parts Warranty for long-term peace of mind.
Why You’ll Love It
✅ Perfect for Compact Spaces — Ideal for bedrooms, offices, or dens up to 400 sq. ft.
✅ True DIY Installation — Pre-charged Quick Connect® line sets and DIYPro™ cable mean no vacuuming or HVAC pro needed.
✅ Low-Profile, Seamless Ceiling Fit — Installs neatly between standard 16” joists for a clean, built-in appearance.
✅ Smart-Home Ready — Control via SmartHVAC® app, Alexa, or Google Assistant.
✅ Follow Me® Comfort — Wireless remote senses your location and adjusts temperature accordingly.
✅ Quiet, Efficient Operation — Ultra-quiet DC inverter performance from 24–38 dBA.
✅ Advanced Filtration & Elevation Filter Access — Cleaner indoor air and hassle-free filter changes.
✅ All-Season Performance — Reliable heating and cooling with smart Auto mode and multiple fan settings.
✅ Industry-Leading Warranty — Limited Lifetime Compressor Warranty (with registration), 7-Year Compressor Warranty, 5-Year Parts Warranty.
What’s Included:
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MRCOOL® 9K DIY® OuttaSight® 5th Gen Ceiling Cassette (230V)
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Wireless Remote Control
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Installation Accessories
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MRCOOL® Warranty
Questions, answered
Everything homeowners ask before buying a MRCOOL® system.
Installation
Do I need an HVAC technician to install this?
No. MRCOOL® DIY systems are designed for homeowner installation. The pre-charged Quick Connect® line set means there's no refrigerant handling, no vacuum pump, and no special tools or license required.
How long does installation take?
Most single-zone systems go in within a few hours: mount the indoor air handler, set the outdoor condenser, connect the pre-charged line set, and power it on.
Do I need an electrician?
The system needs a dedicated circuit. Most homeowners have a licensed electrician add the breaker and disconnect — everything else you can do yourself.
Sizing & compatibility
What BTU size do I need?
As a rule of thumb: up to 400 sq ft → 9–12K BTU, 400–600 sq ft → 12–18K, 600–1,000 sq ft → 18–24K. Use the room-size guide above and factor in insulation, ceiling height and sun exposure.
Will it heat in winter?
Yes — these are heat pumps, so they heat and cool. Many MRCOOL® systems keep heating in sub-freezing temperatures; check each model's spec sheet for its low-temperature heating range.
115V or 230V — which do I need?
9K–12K units are usually 115V (standard outlet circuit); 18K and larger are typically 230V. The voltage is shown in the product options and specifications.
Warranty & support
What warranty is included?
MRCOOL® systems carry manufacturer warranty coverage — typically 5–10 years on major components when you register your system after installation.
How do I get help choosing or installing?
Email support@coolheatdirect.com — our U.S. team replies within one business day with sizing, voltage and compatibility help.
Shipping & returns
How fast does it ship?
Most products ship in 3–5 business days with free curbside delivery in the continental U.S. The freight carrier calls to schedule your delivery.
Can I return it?
Returns are accepted within 30 days on new, unopened items in original packaging. A restocking fee may apply to HVAC equipment — we always confirm before issuing a return authorization.
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