Kitchen Exhaust Fan Size Chart

In a kitchen an exhaust fan may remove much of the heat produced by cooking appliances but mix in smoke volatile organic compounds grease and vapor from the cooking process and it becomes necessary to remove these products to avoid health and fire risk.

Kitchen exhaust fan size chart.

Sizing an exhaust fan kitchen ventilation text. 2 048 cubic foot room x 15 air exchanges 30 720 cubic feet moved per hour. A ventilation fan should meet at least the minimum size. Static pressure in fan systems is typically less than 2 sp or 0 072 psi.

The exhaust fan drawing below illustrates how static pressures are measured in ductwork with a manometer. The minimum requirements say that this air should be changed 15 times an hour. Fundamentals of kitchen exhaust hot air rises. A 601 to 900 cfm fan requires a 7 inch minimum but an 8 to 10 inch duct is recommended.

One pound per square inch is equivalent to 27 7 sp. To find the fan needed for your size kitchen multiply the number of cubic feet in the room by the number of air exchanges 15 then divide by the number of minutes in an hour 60. A pressure differential between the duct and the. That computes to 960 cubic feet of air in the room.

Say the kitchen measures 10 feet by 12 feet with an eight foot ceiling. Let s take a small kitchen for an example. A ventilation fan should meet at least the minimum size. Use this table to calculate the cubic feet per minute cfm capacity needed for an exhaust fan in a specific room.

Tim carter sizing an exhaust fan tips. This fan calculator is typically used to calculate the cfm or cubic feet per minute of air exchange that may be desired in a building. Finding high quality low maintenance exhaust and air movement equipment can save money for agencies and business owners. A 401 to 600 cfm fan requires a 6 inch minimum duct size with an 8 inch duct recommended.

Ask the builder. Whether exhausting air or bringing fresh air into a structure the calculation produced should help to figure out the size of fan s required to accomplish the air exchanges needed. Commercial and industrial ventilation can be expensive to install or update and finding the right type and size of fan will keep companies and industries in compliance with codes and regulations and make working conditions safe for employees. This means that a fan must have the ability to move 14 400 cubic feet of air in an hour.