GAF Master Flow 16 in. x 8 in. Automatic Open/Close Foundation Vent Black – Resin Construction, Reduces Moisture, Prevents Decay, 57 sq. in. NFA UV Resistant, Easy Installation - FVRABL

Hi-density polyethylene construction. Auto-opens at 70 degrees Fahrenheit, closes at 40 degrees to lower the risk of frozen pipes and to help promote energy efficiency. Replaces traditional manual vents. Snap-in installation. 57 sq. in. NFVA. 16'' x 8''. Please note, while the rough-in dimensions (part of vent that fits into the hole) are 15-3/8" Wide x 7-3/4" Tall x 4-1/4" Deep, the overall vent dimensions including flange are 17-1/2" Wide x 9-1/2" Tall x 4-3/8" Deep. Please ensure there are no obstructions such as exterior trim, siding etc. near the intended installation location that could interfere with the vent's overall dimensions.

• Durable Black Resin Construction: Built to last with high-quality, weather-resistant material for long-term performance in any condition.
• Automatic Temperature-Based Operation: Automatically opens at 70°F and closes at 40°F to maintain optimal airflow and reduce moisture levels.
• Included Protective Screen: Comes with a built-in screen to prevent debris from entering while allowing efficient ventilation.
• UV-Resistant Design: Made to withstand harsh sun exposure, ensuring durability and lasting performance without fading or cracking.