Kitchen Exhaust Hood Cfm

Per minute cfm be provided makeup air at a rate approximately equal to exhaust.

Kitchen exhaust hood cfm. To figure out an appropriate cfm rating for your kitchen you ll want to take into account factors like the size of the room the size of the cooking surface and the heat produced by the cooking surface. Divide the total volume by 4 to get the required cfm rating. 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 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.

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. Stainless steel kitchen exhaust ventilation hoods ranges hood ranges range hoods downdraft ventilation. 567 102 from the above ductwork calculations 669 cfm. M1507 4 local exhaust rates.

The best cfm for a range hood. They require that all kitchen exhaust hood systems capable of exhausting more than 400 cu. Local exhaust systems shall be designed to have the capacity to exhaust the minimum air flow rate determined in accordance with table m1507 4. The fans in range hoods are rated by the cubic feet of air they move per minute cfm and it s important to buy a range hood that moves enough air to be effective.

Note that not both exhaust fans are required for hood exhaust. International residential code irc says the minimum intermittent exhaust rate for a kitchen is 100 cfm while the minimum continuous exhaust rate is 25 cfm. Commercial kitchens or households that do a lot of heavy cooking need to get a range hood with at least 350 cfm. Because ventilation requirements vary from state to state and even from city to city it s important to check with local.

We have calculated 380 cfm based on the width of the hood 500 cfm based on the burner output and based on your kitchen volume 567 cfm. Click on a hotspot to view products that relate to the image on the diagram. Moreover code watcher advises that since 2009 the international residential code irc includes a section on air replacement for houses with active kitchen ventilation. Some state building codes do require mechanical ventilation such as an exhaust fan in the kitchen.

This amount of power is enough to pull out excess steam and strong odors from the kitchen. The highest of these values is 567 so we will use that in our calculation. Add more based on ductwork. The air movement or power for range hoods is measured in cubic feet per minute cfm.