Kitchen Hood Duct Size

To determine the correct size grease range hood system to install national fire code nfc dictates that the hood should be 6 inches larger on all sides compared to all of the equipment that is under it.

Kitchen hood duct size. 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. Take note of the size and position of your kitchen. Range hood duct installation issues troubleshooting and problem solving. 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.

2 5 wide stove x 100 250 cfm minimum range hood fan size. The minimum duct sizes and recommended duct sizes based on a hood fan s cfm rating are as follows. Excel sheets for the design of and sizing of kitchen hoods. Sizing a grease hood and heat condensate hood.

The minimum recommended duct size is 6 for 0 400 cfm range hoods. We are open service tech support parts fast lead times from 6 local plants. What is the minimum duct size for a range hood. The smaller the duct size the less cfm you need and the larger the duct size the more cfm you need.

Most hood manufacturers also offer hood end panels. This will allow for a. When a cooker hood is specked with a 150mm outlet then 150mm ducting round or rectangular is what should used for it. Minimum duct size of 4 recommended duct size of 6 401 600 cfm.

Download autocad fonts library free shx fonts. For more information on duct size click here. Hvac duct size calculator excel free ductulator. Should the hood duct connection fall under a beam or a bar joist request that the hood duct collar be shipped for on site.

Then work with the equipment supplier to achieve a workable hood size and equipment layout. View the kitchen exhaust duct sizing chart below to determine your ductwork diameter based on range hood cfm. Minimum duct size of 6 recommended duct size of 8. A 0 to 400 cfm fan requires a 4 inch minimum duct size but a 6 inch duct is recommended.

In the hoods spec will also be it s maximum ducting distance and when looking at that distance any bends in the ducting reduce the effective distance by 500mm for each bend.