Kitchen Exhaust Hood Duct Size

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Kitchen exhaust hood duct size. Grease ducts are regulated both in terms of their construction and maintenance forming part of the building s passive fire. How to install a through the wall exhaust fan ask this old house duration. 1 the shell of the hood 2 the baffled grease filters and 3 the trough at the bottom of the filters. 2 5 wide stove x 100 250 cfm minimum range hood fan size.

Sizing an upblast or exhaust fan. Minimum duct size of 4 recommended duct size of 6 401 600 cfm. A 0 to 400 cfm fan requires a 4 inch minimum duct size but a 6 inch duct is recommended. The minimum duct sizes and recommended duct sizes based on a hood fan s cfm rating are as follows.

Supply air is recommended to be 90 of your determined exhaust cfm. A commercial restaurant kitchen grease exhaust type 1 vent hood is essentially comprised of three main components. View the kitchen exhaust duct sizing chart below to determine your ductwork diameter based on range hood cfm. The basic rule of thumb when determining the fan size of a range hood is that it should move a minimum of 100 cfm of air for every 12 of stove width.

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. Minimum duct size of 6 recommended duct size of 8. Ommercial kitchen design professionals were concerned that the minimum exhaust air ductwork velocity of 1 500 fpm 7 62 m s as required by the national fire protection. Sions and exhaust duct size remains the same the result will not only be a decrease in exhaust velocity but a corresponding in.

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. Note some local codes require 100 cfm ft. This old house 1 108 277 views. 2 of hood area for wall style hoods.