How Passive Ventilation Moves Air Through the Attic
Passive attic ventilation is the most common form of attic ventilation, especially in traditional open attic spaces. Air moves through openings in the roof systemRoof Types - A roof system (roof assembly) is the entire series of roofing layers and components above the roof deck that work together to weatherproof the building. More because warm air rises and wind creates pressure around the house.
The system is “passive” because air moves without powered equipment. With no fan motor or powered mechanism, there are fewer parts to maintain and fewer parts that can stop working.