The answer to 'what is ridge vent' is a type of roof ventilation system that runs along the peak or ridge of a roof. Ridge vents are designed to allow hot, moist air to escape from the attic, which helps to regulate the temperature and humidity in the home. They work by creating a passive airflow, drawing in cooler outside air through vents in the soffit or eaves and allowing the warmer, stale air to vent out through the ridge vent.
Ridge vents are a popular choice for homeowners because they are relatively inexpensive, easy to install, and provide effective ventilation without the need for powered fans or other mechanical systems. They can be made from a variety of materials, including aluminum, plastic, or even specialized ridge vent shingles, and can be customized to fit the specific roof design and pitch.