3. Attic Ventilation Attic Ventilation is important because it allows air to flow freely from the outside to the inside. In some houses, it is part of the ventilation system as well. Also helps keep the air from staling. The soffit vent gives ventilation among the rafters. The ridge vent produces a pathway for air through underside of the roof decking. Roof turbine provides air down through the roof decking to the attic space. The vents are soffit vent, ridge vent, gable vent, and roof turbine.