For commercial kitchen applications when not specified by code the following guidelines may be used to determine the minimum kitchen hood exhaust cfm.
Commercial kitchen exhaust duct size.
Kitchen exhaust grease duct.
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Inventors of the positive pressure chimney system selkirk products meet and exceed the requirements of codes and other manufacturer products.
Minimum duct size of 4 recommended duct size of 6 401 600 cfm.
View the kitchen exhaust duct sizing chart below to determine your ductwork diameter based on range hood cfm.
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A grease duct is a duct that is connected to the kitchen exhaust hood and is specifically designed to vent grease smoke and other harmful contaminants from commercial cooking equipment to the outside of a building.
Use this formula to also determine the size of heat hoods.
Factor built commercial exhaust hoods which are tested in accordance with ul710 listed labeled and installed in accordance shall not be required to comply with sections.
Read on to determine how to size your exhaust and supply fans.
Minimum duct size of 6 recommended duct size of 8.
Sizing an upblast or exhaust fan.
At 1200 cfm and above the duct size will depend on the type of fan motor and the length of the duct run but it should never be smaller than 10 inches in diameter.
Ommercial kitchen design professionals were concerned that the minimum exhaust air ductwork velocity of 1 500 fpm 7 62 m s as required by the national fire protection.
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