Kitchen Exhaust Fan Size Chart

This means that a fan must have the ability to move 14 400 cubic feet of air in an hour.

Kitchen exhaust fan size chart.

One pound per square inch is equivalent to 27 7 sp. A 401 to 600 cfm fan requires a 6 inch minimum duct size with an 8 inch duct recommended. Static pressure in fan systems is typically less than 2 sp or 0 072 psi. A ventilation fan should meet at least the minimum size.

A pressure differential between the duct and the. Sizing an exhaust fan kitchen ventilation text. 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. Let s take a small kitchen for an example.

A 601 to 900 cfm fan requires a 7 inch minimum but an 8 to 10 inch duct is recommended. 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. The minimum requirements say that this air should be changed 15 times an hour. Fundamentals of kitchen exhaust hot air rises.

When replacing or installing a range hood take note of the size shape and mounting type before going to the store the new hood should be at least as wide as the range or cooktop and preferably 3 inches longer on each side. Finding high quality low maintenance exhaust and air movement equipment can save money for agencies and business owners. The most common widths are 30 and 36 inches. 2 048 cubic foot room x 15 air exchanges 30 720 cubic feet moved per hour.

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. Ask the builder. The exhaust fan drawing below illustrates how static pressures are measured in ductwork with a manometer.

Fan static pressure is measured in inches of water gauge. Say the kitchen measures 10 feet by 12 feet with an eight foot ceiling. A ventilation fan should meet at least the minimum size. That computes to 960 cubic feet of air in the room.