Witten Thermo-Plastic Foundation Vent, with Automatic Damper Control, 8" H x 16" L
This Witten foundation vent replaces old-style manual vents. This vent automatically opens at 70-degrees fahrenheit and closes at 40-degrees fahrenheit (approximately).
• Fits standard 8-inch x 16-inch vent openings with 18-inch lintel
• High-density thermo-plastic construction
• Stainless steel compression spring
• Heavy-duty aluminum mesh screen
• Bi-metal coil, fully enclosed in protective cover