A 0 to 400 cfm fan requires a 4 inch minimum duct size but a 6 inch duct is recommended. Calculating range hood cfm vent fan size.
Ideally a hood vent is as wide or wider than your range.
Kitchen exhaust hood dimensions. Kitchendining facility has more than 5000 cfm of exhaust hoods the requirements for the larger system applyindividual exhaust hood airflows must be checked against the maximum airflow table and one of the three energy saving methods must be met. When replacing or installing a range hood take note of the size shape and mounting type before going to the store. The right kitchen ventilation can not only clear smoke it can minimize odors of food in preparation.
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. Get a super fancy kitchen hood that defines your space architecturally or go minimal for function with an under cabinet range hood. A 401 to 600 cfm fan requires a 6 inch minimum duct size with an 8 inch duct recommended.
Measure the width of your range with a tape measure. Sort through your range hood options till you land on what feels right. The minimum duct sizes and recommended duct sizes based on a hood fans cfm rating are as follows.
Maximum air flow capacity cfm 190. Note that not both exhaust fans are required for hood exhaust. In the examples used above if your kitchen has a 30 stove 250 cfm minimum in a 16 x 16 x 8 room 512 cfm minimum and a 40000 btu gas stove 400 cfm minimum you would want a fan rated at 512 cfm or higher plus 100 cfm for the ductwork for a total of 612 cfm or more.
Kitchen exhaust cleaning routine professional and proper kitchen exhaust hood cleaning prevents fuel overloads and keeps your system maintained in order to prevent hazardous fires that can destroy property and risk lives of employees and customers. Read on to determine how to size your exhaust and supply fans. Vent install type ducted.
Range hood size width 30 in. Hood vents are generally 30 36 or 42 inches wide. In order to determine your needs consider the size and type of your range and the amount of space required for the hood vent.
A 601 to 900 cfm fan requires. Bv range hood 30 inch 900 cfm under cabinet seamless stainless steel kitchen range hoods dishwasher safe baffle filters wled lights ducted kitchen exhaust fan hood 319. The new hood should be at least as wide as the range or cooktop and preferably 3 inches longer on each side.
Broan aluminum power pack range hood insert exhaust fan and light combo for over kitchen stove silver 80 sones 250 cfm 406.