The Lambro 6-in. Galvanized Steel Fresh Air Intake Wall Vent with 3-in. Pipe allows clean, fresh air into the home when gas appliances are present or when today’s houses are airtight. The vent design for new and replacement installations over an existing 6-in. opening. It features an opening containing a wire mesh screen with a net-free area of 18 sq. in. Removing the screen for an unrestricted opening provides a net-free area 34 sq. in. The vent’s manufacturing material is 26-gauge galvanized steel for durability to maintain longevity. All gas appliances should have a fresh air intake vent if they are indoors. These include gas heaters, fireplaces that use gas, gas water heaters, and gas dryers. If they don’t have a fresh air intake vent, they rely on the oxygen in the air, adding carbon monoxide and carbon dioxide in unhealthy ranges to the home. Make sure to check local building codes before installation.