This Insulated FLOOD VENT foundation model seals out cool or warm air with a solid door and weather stripping. The 2-in. styrofoam core inside the vent door has an 8.34 R-value.
This model is certified for 200 sq. ft. of flood protection per vent and is 16-in. x 8-in. (standard CMU or block size), Constructed of marine grade 316 stainless steel, and is 3-in. in depth. Powder coat paint options are available.
