GAF Master Flow Aluminium Block Foundation Vent in Mill

The Master Flow Block Style 16 in. x 8 in. Aluminum Foundation Vent is designed to enhance air circulation, reduce moisture buildup, and help prevent foundation decay. With 73 sq. in. of Net Free Ventilating Area (NFA), this vent improves airflow efficiency in crawl spaces and foundations. The manually adjustable aluminum louvers allow for precise ventilation control, while the durable galvanized steel and aluminum construction ensures long-lasting durability and corrosion resistance. Featuring a built-in screen to block debris and pests, this vent is ideal for block, brick, or frame construction without requiring a lintel.

Enhances Foundation Ventilation – Provides 73 sq. in. of Net Free Ventilating Area (NFA) to reduce moisture and prevent decay. Manually Adjustable Louvers – Allows for customized airflow control to optimize foundation and crawl space ventilation. Built-In Screen for Pest & Debris Protection – Prevents rodents, insects, and debris from entering the foundation. Durable Aluminum & Galvanized Steel Construction – Ensures long-lasting performance and corrosion resistance. No Lintel Required for Installation – Designed for easy mounting on block, brick, or frame construction. Optimized for Airflow Efficiency – Helps improve indoor air quality and home energy efficiency. Weather-Resistant & Strong – Withstands harsh outdoor elements while maintaining reliable ventilation. Standard Size for Easy Fit – Measures 16 in. x 8 in. (actual size may vary slightly) for seamless installation. Low-Maintenance & Long-Lasting – Designed for durability and effective performance over time Trusted HVAC Brand – Master Flow provides high-quality, professional-grade foundation ventilation solutions.