Grease Exhaust Height Above Roof

Provide specifications and installation detail for the grease duct wrap.

Grease exhaust height above roof.

Roof deck to top of exhaust fan windband 40 min. This creates a deadly fire hazard and liability for your business. One side is hinged with a flexible electrical connector for inspection and cleaning. Exhaust collar and the roof curb cap must be welded to the exhaust duct.

In all areas exhaust vents should be at least 1 foot above roof surface. 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. Exhaust vents must not be located where they might be obstructed by drifting snow consult local experience as to the height of snow drifts against buildings. National fire protection association nfpa standard 45 specifies a minimum stack height of 10 ft to protect rooftop work ers.

Provide a light test for grease duct prior to enclosing or concealing. Ductwork installation by others 9. Fats oils and grease are discharged from your upblast hood exhaust fan and collects on your roof. Make sure the hood is level.

Install light bulbs supplied by others light globes and grease filters in the hood. For applications where the 10 horizontal distance cannot be met separation between exhaust and supply must be at least 3 feet. Ducts conveying explosive or flammable vapors fumes or dusts shall terminate not less than 30 feet 9144 mm from a property line 10 feet 3048 mm from openings into the building 6 feet 1829 mm from exterior walls or roofs 30 feet 9144 mm from combustible walls or openings into the building that are in the direction of the exhaust discharge and 10 feet 3048 mm above adjoining grade. A grease collection device that is applied to exhaust systems that does not inhibit the performance of a fan.

Rovide a light test for grease duct prior p to enclosing or concealing. A listed grease collection system that is in accordance with section 510 9 1 4 and section 510 9 1 5. How the exhaust fan termination to be a s minimum 40 above the roof. A listed grease duct in accordance with section 507 4 7 or ductwork in accordance with section 507 4 8.

Show the exhaust fan termination to be a minimum 40 inches above the roof. From all exhaust fans. Location direction or nature of the exhaust. Threaded rods should be 1 2 closer to the back wall at the top hanger so as to pull the hood against the wall.

Supply fan intake 10 min. Roof deck to top of curb 18 min.