7 8 2 1 rooftop termination shall be arranged with or provided with the following.
Standard kitchen duct on roof.
Standard up blast power roof ventilators prv up to 2 in.
The grease hood duct from the ceiling to where it exits the building should be enclosed in a fire rated enclosure or approved fire barrier type insulation see 3m or be listed double wall grease duct see metalfab except if the roof where the duct exits is right above the room hood.
Fire in kitchen spreading into duct and then fire in duct spreading breaking out to another area.
Cut the hole for the duct attach it then install the roof cap.
Grease hood duct should not be lined.
A fire within the.
Hood static pressure loss in.
California requires kitchen ventilation in all new construction and remodels and even if your local authorities don t require it you should address it anyway.
Imok2 the lining in your link if for the makeup air supply.
Hopefully this kitchen exhaust duct sizing guide helps provide some answers and insight about choosing and planning out the size of your duct and how you will run it.
The relevant standard which forms the basis for the california ventilation code is ashrae standard 62 2 2007.
Ommercial kitchen ventilation ckv design must consider every.
If you live in an area where frost occurs add an insulated duct sleeve to the portion of pipe in the attic.
If you have any questions please feel free to give us a call at 877 901 5530.
Ducts come in several sizes for range hoods.
Minimum duct sizes and recommended duct sizes are based on the cubic feet per minute rating of the duct fan.
Screw the ductwork together with 1 4 in.
Fire spreads to grease on rooftop fire spreads to other systems fire breaks out in kitchen fire spreads into exhaust ductwork fire breaks out at fan in plantroom burning grease leaks out of duct joins plantroom figure 2.
Kitchen exhaust systems can be as different as the kitchens they serve.
Should the hood duct connection fall under a beam or a bar joist request that the hood duct collar be shipped for on site.
Whether it s a straight and vertical shot from stovetop to rooftop or there are multiple twists and turns involved in the ductwork kitchen exhaust cleaners must be able to work with any system as multipurpose facilities and mixed use developments become increasingly popular kitchen exhaust systems must adapt to a.
Sheet metal screws and seal the seams with aluminum faced duct tape not regular cloth backed duct tape.
Finally install the hood.
