Summer: If not properly ventilated, your attic can reach 160ºF during the summer. This heat can seep into your home raising your A/C costs. The heat also increases the aging rate of wood and asphalt in your attic, shortening its life.

	Winter: During the winter months, the primary purpose of ventilation is to remove excess moisture from the attic. This moisture can damage the roof from the inside out, provide an enviroment for mold to grow, and increase energy costs.

	1: Wind blowing over the ridge of the roof creates a negitive pressure that draws the warmer air out of the attic. This draws dry, cool replacement air through soffit vents under the eaves.

	2: Air passes insulation through air channels between rafters, bathing the underside of the roof. Even with no wind, the natural convection action of rising warm air maintains a continuous airflow.

	3: Hot air and moisture leaves the attic from gable vents, ridge vents, and roof vents. A balanced ventilation system is capable of working year round with no moving parts or energy consumption.