AUTO FOUNDATION VENT BRN W/LINTL

With 18" lintel for new construction. Fits standard 8" x 16" vent openings. High density thermo-plastic construction. Automatically opens at 70 degrees Fahrenheit, closes at 40 (approximately). Key working mechanism, bi-metal coil, fully enclosed by protective cover. No electrical hook-up required. Stainless steel and corrosion resistant metal parts. 62 square inches net free area. Heavy-duty aluminum mesh screen, front and back. 8" x 16".