How attic ventilation works. Before the vent types, it helps to understand how attic ventilation works. Proper attic ventilation allows air to flow through the attic, entering at intake vents (typically low, at the eaves or soffits) and exiting at exhaust vents (typically high, at or near the ridge). This airflow, moving through the attic, carries away heat and moisture, helping maintain a healthy attic.

Ridge vents. Ridge vents are a common type of exhaust vent installed along the ridge, the peak line of the roof. Ridge vents provide continuous exhaust along the ridge.

Soffit vents. Soffit vents are a common type of intake vent installed in the soffits, the underside of the roof overhang at the eaves. Soffit vents allow air to enter the attic low, at the eaves.

Box vents and other roof vents. Box vents, also called static vents, are another type of exhaust vent — individual vents installed on the roof, typically near the ridge, that allow hot air to escape.

Powered and other specialized vents. Powered vents use a fan to actively move air rather than relying on natural airflow.

How the vents work together. A key point is that the vent types work together to ventilate the attic, particularly the pairing of intake and exhaust.

The importance of balanced ventilation. Balanced ventilation means having adequate and properly balanced intake and exhaust so air flows through the attic effectively.