Smart Vent now offers a pour-in-place vinyl buck, which allows its 16"-by-8", 16"-square, and 32"-by-16" stainless steel foundation flood vents to be installed directly into concrete forms. Made of construction-grade PVC, the bucks eliminate the need to create an opening manually and can accommodate standard full and nominal foundation-wall thicknesses.The smallest Smart Vent offers 200 square feet of coverage, and every model is designed to protect against hurricanes, flash floods, and corrosion.