Kitchen Hood Vent Size

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Kitchen hood vent size. A commercial restaurant kitchen grease exhaust type 1 vent hood is essentially comprised of three main components. The highest number is 500 then add your ductwork cfm calculations 100 and you would need a total of 600 cfm for this range size kitchen size range burner and ductwork. The system according to nfpa 96 includes the kitchen hood filters fans fire suppression system light covers ducts grease removal devices and any metal surfaces. The pljw 185 is a four speed vent hood.

Choose the greatest of these 3 guidelines to size your range hood. Don t forget to add the value from step 4. In homes with naturally drafted fuel fired appliances like a boiler inside the envelope kitchen range hoods that exhaust more than 400 cu. 1 the shell of the hood 2 the baffled grease filters and 3 the trough at the bottom of the filters.

Connect the vent hood using screws and anchors to ensure a good tight fit. Of air per minute require makeup air so they don t depressurize the home and draw combustion gases from the appliance into the living space. The minimum duct sizes and recommended duct sizes based on a hood fan s cfm rating are as follows. If the inspection shows evidence of a build up of greater than 50 microns of grease laden vapors in the kitchen hood the hood system must be cleaned.

On the lowest two speeds 240 cfm and 360 cfm a 4. 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. Our suggestion for bob is to connect the vent hood to the existing 4 ductwork and not convert the hood to recirculating. Hood vents are generally 30 36 or 42 inches wide.

After arriving at cfm recommendations based on heat output range size and kitchen size compare the numbers. Step 3 install the vent hood. Ideally a hood vent is as wide or wider than your range. Install the fan the filter and the light kit.

Our suggestions for bob. Restaurant grease and heat hood sizing guide. To ensure the best performance size your range hood based on the highest number of the 3. A 0 to 400 cfm fan requires a 4 inch minimum duct size but a 6 inch duct is recommended.

Caulk around the seams between the vent hood and the ceiling. Use this formula to also determine the size of heat hoods. 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. Measure the width of your range with a tape measure.