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A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · U · V · W · X · Y · Z   entire Web this site roof ventilator A stationary or rotating vent used to ventilate attics or cathedral ceilings; usually made of galvanized steel, or polypropylene. Related categories    • VENTILATION TOPICS    • ROOFS AND ROOFING MATERIALS Also on this site: Encyclopedia of Science Transport Concepts & Designs (partner site) BACK TO TOP