Commercial Kitchen Hood Worksheets

These worksheets help you work through the numbers and the vocabulary of commercial kitchen hoods: how much air a hood of a given length or opening moves, how a canopy is sized by two different methods, and what the published definitions say about Type I, Type II and ventless hoods. The exhaust rate or capture velocity is always a factor you type from your hood maker’s listing, your adopted code or your designer; the page does not reproduce code tables. They are estimates and teaching worksheets, not stamped engineering documents.

Tools in this group

• Commercial Kitchen Hood Sizing Worksheet — Enter the cooking line, overhang and mounting to get the hood size, then compare the published canopy formula with your own airflow per foot.
• Exhaust Hood Calculator — Type the opening width and height and a face velocity to get the airflow in cfm and L/s, or turn it around to find the velocity or the opening.
• Kitchen Hood CFM Calculator — Enter the hood length and the airflow per foot your listing or designer gives, or add up appliance cfm, to see total exhaust in cfm and L/s.
• Type 1 Hood — Tick the appliances under the hood to see how public sources classify them, then enter the hood length and rate for the exhaust cfm.
• Type 1 vs Type 2 Hood — Answer five yes or no questions about grease, smoke, steam and fuel to see which hood type public definitions point to, then compare the two side by side.
• Type 2 Hood — Tick the appliances to see how public sources classify them, then enter the hood length or face area for the exhaust cfm of a condensate hood.
• Ventless Hood Guide — Tick the appliances, fuel and menu to get the questions to take to the hood maker and the AHJ, and see the heat that stays in the kitchen.