Improper grease exhaust cleaning can pose extreme risks as described in this article by catersource.
Grease kitchen exhaust duct on roof.
Grease duct installed outside of the building shall be protected against accidental damage or vandalism.
Finally install the hood.
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Support vertically installed grease duct from the building structure using rigid structural supports.
Fats oils and grease are discharged from your upblast hood exhaust fan and collects on your roof.
Over 80 of food industry facilities have roof deterioration due to exhaust fan discharge.
Sheet metal screws and seal the seams with aluminum faced duct tape not regular cloth backed duct tape.
Cut the hole for the duct attach it then install the roof cap.
The grease and oil released from roof top kitchen exhaust fans is detrimental to almost any roof membrane.
Also since your business can be held responsible for polluted storm water systems and grease runoff rooftop grease containment is something you need to control.
If you have a commercial cooking operation rooftop grease damage is something that needs to be dealt with.
Commercial kitchen exhaust fans for a complete ventilation system that keeps your entire building comfortable and balanced look to accurex.
This creates a deadly fire hazard and liability for your business.
Verify that the location will not be a public nuisance or create problems in general due to the location direction or nature of the exhaust.
Driploc rooftop 360 grease containment system.
The reason that kitchen exhaust ducts are prohibited from passing through fire walls is.
Now think about doing that at 2 00 am ice on the roof.
However there are certain situations that call for extra roof maintenance such as roof systems that house grease emitting exhaust fans.
Back to the code.
1 you cannot provide a damper in a kitchen exhaust system due to the operating temperatures.
While not part of the code an exhaust system must be cleaned to remove combustable grease.
Grease duct to the type 1 hood and exhaust fan.
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Show the exhaust fan termination to be a minimum 40 inches above the roof.
Action duct is certified by the international kitchen exhaust cleaning association ikeca.
Screw the ductwork together with 1 4 in.
Therefore if the duct is compromised for whatever reason a passage for fire extension from one side of the wall to the other is created.
If you live in an area where frost occurs add an insulated duct sleeve to the portion of pipe in the attic.
If that duct is away from the building how far would be comfortble leaning over the edge of the building.
Show the grease duct exhaust fan to be a minimum 10 foot above grade.