| By :
Dirik Hameed
The first extractor fans were developed in the 1930s and has evolved a great deal since then. The system keeps not only the kitchen environment cleaner but as kitchens have become integrated into other living spaces this is an additional reason for clean, fresh air in the cooking area. Today's fans are more powerful and versatile than their earlier counterparts. The steam from cooking can make furniture and walls become moisture laden. When mold develops the doors might become deformed and open and close with difficulty. The wallpaper risks peeling and the wooden joints too might open. The kitchens of yesteryear were often finished in ceramic tile and separate from the rest of the house. The upper middle class usually had a hired cook and housekeeper to keep the kitchen surfaces clean and odor free. Without extraction canopies strong cooking smells will pervade the house. The cooking oils vaporize and become trapped in room furnishings. This includes window coverings such as blinds or curtains as well as upholstered furniture and electronic equipment such as computers and tv monitors. The air needs to be changed ideally at twelve times per hour to keep the air free of airborne contaminants. The fan extractor consists of three main sections starting with the familiar bell shaped hood. This helps to catch the rising gases coming from cooking foods. The shape has undergone some design changes so that a more contemporary flat, curved surface is familiar in many kitchens. The grease filter and fan motor make up the remaining two parts. The shape such as the canopy will help to extract the odor-filled air replacing it with clean, odor free air. The old air is ducted outdoors but when lack of space prevents the installation of ductwork then a charcoal filter is used for catching odors. Regular washing will ensure it reaches its longevity of three years. Teh second aluminum filter will capture grease and should also be washed regularly. The width of the canopy comes in sixty or eighty centimeters to match the width of the stove. The ceiling mounted hoods must be attached to reinforced ceilings. The popular island integrated stove is accompanied by a canopied fan above it. This is controlled by remote and is a more expensive but powerful fan too. It will contain halogen or fluorescent lighting to light the food preparation area on the stove top. The standard canopy is available in several colors as well as stainless steel. The aluminum grease filter as well as charcoal filters work together to prevent grease from spreading in the room. The filters will need to be washed every three to four months depending on the frequency of use. When installing the extractor fan the route should be the shortest and most direct. The ducting should be round since air travels the fastest. It should also be a rigid duct since that is more flexible. If it is not possible to add round pipe ducting then a rectangular alternative is used. It is usually hidden in the ceiling but in industrial kitchens the ducting is often visible.
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