The Optimum roof exhaust is designed for sloped roofs of 2/12 and more. Its design prevents the interior hatch from freezing allowing optimal air evacuation all year. The interior is insulated to prevent any risk of condensation. This valve picks up stale air from appliances heading outwards such as dryers, bathroom fans or stove hoods. The mesh is made from the same galvanized steel and the structure blocks the intrusion of birds or rodents inwards with minimal maitenance. The front deflector prevents the infiltration of inclement weather that could clog the inner hatch.