Commercial Kitchen Exhaust Duct Sizing

Minimum duct size of 6 recommended duct size of 8.

Commercial kitchen exhaust duct sizing. View the kitchen exhaust duct sizing chart below to determine your ductwork diameter based on range hood cfm. Ashrae tech nical committee 5 10 kitchen ventilation sponsored and provided project guidance for a recently completed research. A i 144 q i v i 1b where. Flex duct 05 on most metal duct calculator round metal pipe 06 on most metal duct calculators field duct sizing chart rectangular sheet metal duct 07 on most metal duct calculators.

The illustration above shows a typical commercial kitchen application utilizing a roof mount upblast exhaust fan or wall mount upblast exhaust fan in conjunction with a supply fan. Read on to determine how to size your exhaust and supply fans. Are you interested in representing captiveaire and selling our products. Kitchen exhaust grease duct.

Sizes of ducts are then given by the continuity equation like. Minimum duct size of 7 recommended duct size of 8 10. 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 association nfpa 96 1 was too restrictive. A q v 1 where.

A duct cross sectional area m 2 q air flow rate m 3 s v air speed m s alternatively in imperial units. Minimum duct size of 4 recommended duct size of 6. 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. Note that not both exhaust fans are required for hood exhaust.

As an example we can use the previously mentioned set up referenced in the sizing a hood section the 12 hood with the equipment listed would need an average of 4000 cfm. Selecting sizing exhaust hoods is the first design guide in a series that will help you achieve optimum performance and energy efficiency in your commercial kitchen ventilation system. The information presented is applicable to new construction and in many instances retrofit construction. Please fill out the following form and we will contact you soon.