The project is represented in a factory which produces ventilation hoods that are used in homes, restaurants for kitchens, bathrooms and closed-door places to remove odors and smoke. They are manufactured in special sizes according to customers’ requests. The normal ventilation hood size is (20, 25 and 30 cm) and the size of central air hood is (895 X 520 X 600 and 895 X 520 X 581 and 895 X 500 X 535). The factory products are characterized by a two-way rotary switch for suction and removing, besides a push-button switch. The rear windows are closed and unbreakable. The suction drains or sucks the oils and odors caused by food preparation, thus preventing the accumulation of oils and fats in the kitchen.