Exhausts evaporative cooler air into attic. Reduces excessive attic heat and increases cooler efficiency. Vents should be installed in the ceiling of each major room to allow cooler air to escape into the attic. Improved home security with free attic venting as the home can be locked while cooler is operating. Noise from outside is reduced. Up-Dux is rated 900 CFM nominal free air flow and provides cost free attic power-venting.