The Owens Corning T0800 (OC80011/2SHEETQ) is a premium rigid fiberglass duct board, acting as the critical thermal and acoustic "armor" for your HVAC air distribution system. This 1-1/2 inch thick sheet functions as the system's primary brain for temperature retention, engineered with a tough, flame-retardant foil-scrim-kraft (FSK) vapor barrier. Specifically designed for the fabrication of rectangular ductwork, the T0800 ensures that conditioned air reaches its destination without the thermal energy loss or "sweating" common in uninsulated metal ducts. By absorbing mechanical vibrations and airflow turbulence, this duct board provides whisper-quiet operation while maintaining superior indoor air quality through its antimicrobial-treated interior surface. 

Key Features

• Genuine Owens Corning Part Number T0800: Guaranteed professional-grade fit featuring a high-density fiberglass core for maximum structural integrity in custom duct fabrication.
• Superior 1-1/2" Thermal Insulation: Specifically engineered to provide an R-6.0 or higher thermal value, preventing condensation and significantly lowering energy consumption.
• Eliminate Noise and Vibration Issues: Replaces loud, echoing sheet metal ducts with sound-absorbing fiberglass that traps "fan roar" and prevents the popping sounds of thermal expansion.
• Advanced Safety Monitoring: Manufactured with a UL 181 Class 1 rating, ensuring the board meets the strictest fire safety and smoke-developed standards for residential and commercial use.
• Antimicrobial Interior Surface: Features a specialized coating that prevents the growth of mold and bacteria, protecting your home’s air supply from biological contaminants. 

Product Details

• Brand: Owens Corning
• Manufacturer: Owens Corning
• Part Number: OC80011/2SHEETQ (T0800)
• Dimensions: 1-1/2" Thick x 48" Wide x 120" Long (10 Feet)
• Thermal Resistance: R-6.3
• Vapor Barrier: Foil-Scrim-Kraft (FSK) Facings
• Fire Rating: UL 181 Class 1 Air Duct
• Maximum Velocity: 5,000 FPM
• Maximum Temperature: 250°F (Internal)
• Weight: 18.5 lbs per sheet 

🛠️ HVAC Depot Pro Tip

Take a Picture First — Before you begin grooving or folding the sheet, photograph the printed UL 181 label and the R-value specifications on the FSK facing. This visual record is often required by local building inspectors to verify code compliance after the duct is installed and sealed. When fabricating, ensure you use a dedicated duct board knife set to achieve clean 90-degree V-grooves; jagged cuts will lead to air leakage and structural weakness. Always seal all exterior seams with UL 181A-P pressure-sensitive tape or UL 181A-M mastic to guarantee a 100% airtight seal. 

Cross-Reference

• Superseded Parts: OC-T800-1.5, 800-112-FSK
• Legacy Drawing Numbers: Type 800, Type 1000 (Heavy Duty), UL 181 Class 1
• Equivalent Brands: Johns Manville Super-V, Knauf Air duct Board, CertainTeed Ultra*Duct 

Model Compatibility

• Residential Supply Plenums (Suffixes: High-Efficiency Gas and Electric Systems)
• Return Air Trunk Lines (Suffixes: Central Air and Heat Pump Series)
• Commercial Branch Ducts (Suffixes: VAV and Constant Volume Systems)
• Custom Transition Boxes (Suffixes: Furnace to Coil Adaptors)