Gravity roof ventilators are the devices usually installed in the attics of homes, where the most heat gathers during the summer from the combination of heat rising in the rest of the home and from the radiant energy of the sun. Extreme temperatures in the attic will leak down into the rest of the house and make it hotter. Gravity relief ventilators can help to keep the home cool without needing to resort as much to the air conditioner.
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