Air Vent Automatic Foundation Vents (Carton of 10)

Fits 8 inches x 16 inches opening Material: Plastic Bi-Metal Coil NFA (Square Inches): 50 Helps remove moisture that can lead to damp rot and eventually costly damage and termite build-up Opens automatically at 70 degree Fahrenheit and closes at 40 degree Fahrenheit, no electricity needed Heavy-duty construction built for long-lasting performance Premium bi-metal coil ensures reliable temperature response Honeycomb grille design promotes airflow while blocking debris 16" x 8" rough opening; 50 sq. in. net free area airflow Helps prevent moisture damage, mold, and termite buildup Installs easily with screws or retaining clips, no mortar required