Kitchen Exhaust Duct Size

Kitchen exhaust grease duct.

Kitchen exhaust duct size. Sions and exhaust duct size remains the same the result will not only be a decrease in exhaust velocity but a corresponding in. Please fill out the following form and we will contact you soon. Read on to determine how to size your exhaust and supply fans. Hopefully this kitchen exhaust duct sizing guide helps provide some answers and insight about choosing and planning out the size of your duct and how you will run it.

The exhaust duct should be liquid tight and pitch back toward the dishwasher. 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. Note that not both exhaust fans are required for hood exhaust. The cubic feet per minute rating is a measure of how much air the fan can exhaust from the kitchen in a minutes time.

Connect the operation of the dishwasher exhaust fan to the dishwasher control panel. 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. Exhaust ductwork should be stainless steel below the kitchen ceiling and either stainless steel or aluminum above the ceil ing. The duct size is directly proportional to the cfm rating.

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. Ducts should be sealed with duct mastic and or metal tape that meets the requirements of the underwriters laboratory ul 181 ul 181a or 181b or with aerosol sealant systems that meet the requirements of ul 723 cec 2005. All kitchen exhaust ducts should be air tight fastened and sealed. A range hood should be able to exchange the air in the kitchen at least 15 times per hour or every four minutes.

You should also take into account the size of your kitchen in cubic feet when calculating the size range hood fan needed since a larger kitchen needs more venting to clear the air than a smaller room.