Designed for maximum air flow efficiency. Cooking smoke and unpleasant odors are whisked away in seconds. Smoke-colored, polycarbonate dome opens manually and comes with a lifetime guarantee. Powerful 12", 10 blade rotary fan works with open doors or windows to create air flow. Lightweight, compact, bug resistant, durable and seals tight when not in use. Motor operates at 3 speeds. Installs in minutes. Fits 14" x 14" openings. 16-1/2"L x 16-1/2"W x 14-1/2" D. 2 year warranty. 1/box