How does a ridge vent system work?
As wind blows around the house, it creates areas of high and low air pressure high pressure under the eaves and low pressure over the peak of the roof. Because air flows from high to low pressure; air in the attic will be pulled out through the ridge vent, to be replaced by air flowing in through the soffit vents. The system also takes advantage of thermal effect to ventilate even on calm days. We all know that hot air rises. The peak vent allows this hot air to continue to go up and out of the house, with cooler air being drawn in through the soffits.