Our house has a direct vent furnace that vebnts to the outside of the house through the foundation. The outside vent is covered with a 4in x 4in plastic louvered vent cover. The problem I have is, between the cold weather, and warm exhaust air, the plastic becomes brittle and the louvers break off leaving a hole into the house. I can not find any other covers other that the plastic ones at Home Depot.
Does anyone have any suggestions