Commercial Kitchen Hood Duct Size

A 0 to 400 cfm fan requires a 4 inch minimum duct size but a 6 inch duct is recommended.

Commercial kitchen hood duct size. With the calculation sheets below you will be able to design the kitchen hoods according to ashrae and greenheck. View the kitchen exhaust duct sizing chart below to determine your ductwork diameter based on range hood cfm. Minimum duct size of 4 recommended duct size of 6. With the additional 12 inches may vary by local regulations for the overhang of the hood this comes up to 140 inches or 11 feet 8 inches.

16 2 please refer to the duct diameter sizing chart by hood size and cfms. 14 2 15 6 to 20 0. Rounding up to the nearest foot you would therefore need a 12 foot hood. Commercial kitchen equipment manufacturer.

Note that not both exhaust fans are required for hood exhaust. Are you interested in representing captiveaire and selling our products. Excel sheets for the design of and sizing of kitchen hoods. A range hood should be able to exchange the air in the kitchen at least 15 times per hour or every four minutes.

The minimum duct sizes and recommended duct sizes based on a hood fan s cfm rating are as follows. If your hood is between 601 and 900 cfm you need a minimum duct size of 7. 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. If your hood is between 401 and 600 cfm you need a minimum duct size of 6.

Minimum duct size of 6 recommended duct size of 8. The hood factor 3 the design process 6 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. For example if your kitchen is 16 long x 16 wide with an 8 ceiling it would contain 2 048 cubic feet of space. Also the sheet provide the method for duct surface area and duct weight calculations.

Here is a breakdown of the duct size you need based on your range hood s cfm if you have a range hood with a cfm of 0 400 you will need a minimum duct size of 4. State of the art stainless steel grease duct systems are nfpa 96 compliant designed to safely convey grease laden vapors from commercial kitchen cooking equipment. 16 wide x 16 long x 8 high 2 048 cubic feet. Minimum duct size of 7 recommended duct size of 8 10.