Industrial kitchens produce considerable amounts of heat with their burners, especially when busy. The ventilation fans and ducts have to cope with this. Wall hoods operate where cookers are placed against a wall and single island hoods for stand alone cookers. Canopies cope with a great deal of heat and stainless steel is the best material for this. Watch the video below to see why stainless steel extraction canopies are such a vital part of the commercial kitchen ventilation system.