A kitchen with a volume of 1200 cubic feet 34 cubic meters would need a range hood with a rating of 1200 4 or 300 cfm.
Kitchen hood vent duct size. Minimum duct size of 6 recommended duct size of 8. 2 of hood area for wall style hoods. Supply air is recommended to be 90 of your determined exhaust cfm. 2 5 wide stove x 100 250 cfm minimum range hood fan size.
Restaurant grease and heat hood sizing guide. We are open service tech support parts fast lead times from 6 local plants. You have to then produce negative pressure or a vacuum to ensure that. Note some local codes require 100 cfm ft.
The minimum duct sizes and recommended duct sizes based on a hood fan s cfm rating are as follows. Once you ve calculated your cfm based on the above points you re also going to want to add 9 cfm for a 9 duct and 25 cfm for every. A 0 to 400 cfm fan requires a 4 inch minimum duct size but a 6 inch duct is recommended. So if you have a 30 wide stove you would need a range hood with a fan that moves at least 250 cfm of air.
The remaining 10 will be drawn from adjacent areas to the kitchen which helps prevent undesirable odors from drifting into areas such as the dining room. A commercial restaurant kitchen grease exhaust type 1 vent hood is essentially comprised of three main components. Minimum duct size of 4 recommended duct size of 6 401 600 cfm. Add more based on ductwork.
How to cut connect and install flex duct flexible pipe for heating air conditioning ventilation duration. The sheet metal kid 549 666 views. Range hood duct installation issues troubleshooting and problem solving. View the kitchen exhaust duct sizing chart below to determine your ductwork diameter based on range hood cfm.