MRCOOL DIY® 5th Gen 9,000 BTU OuttaSight® Ceiling Cassette Air Handler 230V – Single Zone, Up to 350 Sq. Ft. | DIYCASSETTE09HP-230D25-O

MRCOOL® DIY® 5th Gen 9,000 BTU OuttaSight® Ceiling Cassette Air Handler – Single Zone, 230V The MRCOOL® DIY® 5th Gen 9,000 BTU OuttaSight® Ceiling Cassette is a sleek, flush-mounted indoor unit designed for heating and cooling spaces from 151 to 350 sq. ft. Unlike traditional wall-mount units, this ceiling cassette installs discreetly between standard 16" ceiling joists — ideal for new construction, open-plan spaces, and retrofit projects where wall space is limited. Pair it with a compatible MRCOOL DIY condenser and QuickConnect® line set for a complete DIY mini split system. Why Choose MRCOOL DIY® OuttaSight® Ceiling Cassette? Ceiling-Mounted, Out of Sight — Installs flush between standard 16" ceiling joists (including pre-manufactured I-joists) for a clean, unobtrusive look. Ideal for New Construction & Retrofits — No wall space required. Perfect for open-plan rooms, garages, sunrooms, and commercial spaces. America’s #1 DIY Mini Split — The most trusted DIY mini split brand in the nation, built for quick setup and long-term reliability. QuickConnect® Compatible — Works with MRCOOL pre-charged QuickConnect® line sets for a fast, vacuum-free installation — no special tools needed. Eco-Friendly R-454B Refrigerant — Lower Global Warming Potential (GWP) than R-410A for better efficiency and a reduced environmental footprint. Ultra-Quiet Operation — As low as 24 dB(A) on silent mode — barely audible. Advanced Filtration — Improves indoor air quality with built-in filtration; Elevation function allows easy filter access for maintenance. Multiple Wireless Control Options — Control via included remote, the SmartHVAC app (iOS & Android), or hands-free with Amazon Alexa or Google Assistant. Best-in-Class Warranty — 7-year compressor warranty + 5-year parts warranty. Certified Excellence — UL Listed, ETL Listed, AHRI Certified. Product Overview 🏠 Zones: 1 📐 Coverage: 151–350 sq. ft. 🔧 Installation: DIY — Ceiling-Mounted, No Professional Required 💨 Airflow Direction: 1-Way ⚡ Voltage: 208-230V 🔇 Noise Level: As low as 24 dB(A) on silent mode ⭐ Certification: UL Listed, ETL Listed, AHRI Certified 🧄 Refrigerant: R-454B Specifications & Dimensions Capacity & Performance Capacity 9,000 BTU Coverage Area 151–350 sq. ft. Air Flow – Turbo 341 CFM Air Flow – High 294 CFM Air Flow – Medium 259 CFM Air Flow – Low 235 CFM Air Flow – Silent 235 CFM Noise – Turbo 38.0 dB(A) Noise – High 38.0 dB(A) Noise – Medium 36.0 dB(A) Noise – Low 33.0 dB(A) Noise – Silent 24.0 dB(A) Electrical Requirements Voltage 208-230V Phase 1 Cycle 60 Hz Max Fuse Breaker 15A Min Circuit Ampacity 3A Refrigerant & Piping Refrigerant Type R-454B Liquid Line Size 1/4" Suction Line Size 3/8" Dimensions & Weight Dimensions 50.31" W x 13.19" D x 8.98" H Mount Type Ceiling Weight 45 lbs Features Airflow Direction 1-Way Fan Only Option Yes Quiet Mode Yes Auto Cool Yes WiFi Compatibility Yes App Compatibility Yes Works with iOS Yes Works with Android Yes Remote Control Included Yes Certifications & Warranty Certifications UL Listed, ETL Listed, AHRI Certified Parts Warranty 5 Years Compressor Warranty 7 Years Shipping & Returns 🚚 Free Curbside Delivery All MRCOOL orders ship free via FedEx Ground, FedEx Freight, or an equivalent trusted carrier. Delivery is curbside only — please arrange assistance in advance as carriers are not able to bring items inside your home. Tracking & Delivery Tracking information is typically provided within 3–5 business days of your order. Once received, please allow 1–2 business days for tracking details to update. ↩️ Return Policy 30-Day Return Window Returns must be requested within 30 days of your delivery date. We are unable to accept return requests after this period. Return Conditions To qualify for a return, items must be unused and uninstalled, and in original packaging including box and pallet. Restocking Fee A 35% restocking fee applies to all approved returns. 📄 View Full Shipping Policy | 📄 View Full Return & Refund Policy Frequently Asked Questions What condenser is compatible with this cassette? This ceiling cassette is compatible with MRCOOL DIY® 5th Gen single-zone or multi-zone condensers. Match the BTU capacity and voltage, and use a compatible MRCOOL QuickConnect® line set (sold separately). Does it fit between standard ceiling joists? Yes — the OuttaSight® cassette is designed to fit between standard 16" ceiling joists, including pre-manufactured I-joists, for a flush, concealed installation. Can I install it myself? Yes. Use MRCOOL DIY® pre-charged QuickConnect® line sets for a vacuum-free installation. Ceiling installation may require basic carpentry skills. A licensed electrician is still recommended for the electrical hookup. How quiet is it? Extremely quiet — as low as 24 dB(A) on silent mode. Even on high, it runs at just 38 dB(A). What is the warranty? This cassette is backed by MRCOOL’s best-in-class warranty: 7-Year Compressor Warranty 5-Year Parts Warranty Recommended BTU By Room Size BTU Capacity Recommended Room Size (Sq. Ft.) 6,000 BTU Up to 150 sq. ft. 9,000 BTU ← You Are Here 151–350 sq. ft. 12,000 BTU 351–500 sq. ft. 18,000 BTU 501–750 sq. ft. 24,000 BTU 751–1,000 sq. ft. 36,000 BTU 1,001–1,500 sq. ft. Note: Actual performance may vary depending on room insulation, ceiling height, number of windows, climate zone, and heat-generating appliances.