Kitchen Hood Vent Size

Choose the greatest of these 3 guidelines to size your range hood.

Kitchen hood vent size. Don t forget to add the value from step 4. When it comes to ductwork it s a numbers game. The size shape length turns and cap on the range hood ductwork adds resistance which reduces the amount of air the vent fan can move requiring additional cfm for the fan. Ideally a hood vent is as wide or wider than your range.

When using smooth round 8 diameter metal pipe add one cfm per foot of pipe plus 25 cfm for each elbow and 40 cfm for a roof cap. In particular many people choose a hood that isn t deep enough to cover the front of the stove in order to avoid bumping their heads on it and. In this example you ll need a minimum of 567 cfm for this size of the kitchen. Hood vents are generally 30 36 or 42 inches wide.

A kitchen hood exhaust hood or range hood is a device containing a mechanical fan that hangs above the stove or cooktop in the kitchen it removes airborne grease combustion products fumes smoke heat and steam from the air by evacuation of the air and filtration. The minimum duct sizes and recommended duct sizes based on a hood fan s cfm rating are as follows. If you re installing a standalone hood it s easy to make it too small and that makes it less efficient. Many stoves come with their own hoods and the hood is usually the right size for the stove.

1 the shell of the hood 2 the baffled grease filters and 3 the trough at the bottom of the filters. Measure the width of your range with a tape measure. Finally take the number that is larger and use it as the minimum cfm requirement for your new vent hood as you shop. Wall mount range hood 30 inch ducted kitchen exhaust vent stainless steel chimney style over stove vent hood with led light 3 speed exhaust fan 450 cfm tieasy 3 9 out of 5 stars 16 167 98 167.

Next calculate the cfm requirements for your cooktop and compare that to the number you calculated for the volume of your kitchen. Choose ducting that s the same size as or slightly larger than the vent opening. A 0 to 400 cfm fan requires a 4 inch minimum duct size but a 6 inch duct is recommended. For instance a typical 400 cfm unit requires a 6 inch duct while a 1 200 cfm model needs a 10 to 12 inch duct.

To ensure the best performance size your range hood based on the highest number of the 3. Sizing an upblast or exhaust fan. In commercial kitchens exhaust hoods are often used in combination with fire suppression devices so that fumes from a grease. After arriving at cfm recommendations based on heat output range size and kitchen size compare the numbers.

Vent hood ducts photo by photoalto odilon dimier getty.