As the sun heats the roof, roof tiles and air beneath the tiles warm up. Elevated or vented battens allow the warm air to rise to the peak of the roof and escape outside through the ridge vent, which can also be used to vent the attic. Vented Eave Risers at the bottom of the roof draw cool air into the roof system, beneath the tiles. No electrical or mechanical parts are needed, providing easy maintenance and reliability.