Ensure proper ventilation and optimal airflow in your foundation with the Foundation Vent in Brown. Equipped with a bi-metal coil, this vent automatically opens at 70 degrees and closes at 40 degrees, providing efficient regulation for ideal air circulation. The square grill design adds a sleek touch while offering durability. With a 3-year limited warranty, you can trust in the quality and longevity of this vent. Designed to fit standard 8" x 16" vent openings, it provides a generous 65 sq. in. net free area. Give your foundation the ventilation it deserves with this reliable and effective Foundation Vent.