Construction Metals Inc. 8-in x 16-in Plastic Foundation Vent

Gibraltar Building Products deluxe vent-air style foundation block vents are used and designed for pour in walls. Long lasting gray plastic injected mold vents provide necessary airflow for a home's foundation or crawlspace. These provide 73 Sq. In. of net free vent area. Manually operated damper doors allow for maximum airflow in the warmer months, and they close to prevent unwanted cold air and moisture in the winter.