SmartVENT is a certified, code-compliant foundation flood vent that protects a home's foundation during a flood by relieving hydrostatic pressure on the wall. Performing a second function, the 1540-510 model features louvers that automatically open and close as the temperature changes to allow airflow. The vents can be installed in masonry walls, 2x4- or 2x6-framed walls, overhead garage doors, firewalls, and ICFs. Smart Vent Inc. 877-441-8368.