Grease Exhaust Height Above Roof

Supply fan intake 10 min.

Grease exhaust height above roof.

National fire protection association nfpa standard 45 specifies a minimum stack height of 10 ft to protect rooftop work ers. Show how one side is hinged with a flexible electrical connector for inspection and cleaning. Install light bulbs supplied by others light globes and grease filters in the hood. How the exhaust fan termination to be a s minimum 40 above the roof.

Standard z9 5 recommends a minimum stack height of 10 ft above the adjacent roof line an exhaust velocity v e of 3000 fpm and a stack height extending one stack diameter above any architectural screen. One side is hinged with a flexible electrical connector for inspection and cleaning. Fats oils and grease are discharged from your upblast hood exhaust fan and collects on your roof. Threaded rods should be 1 2 closer to the back wall at the top hanger so as to pull the hood against the wall.

Show the exhaust fan termination to be a minimum 40 inches above the roof. Provide a light test for grease duct prior to enclosing or concealing. Rovide a light test for grease duct prior p to enclosing or concealing. This creates a deadly fire hazard and liability for your business.

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. Provide specifications and installation detail for the grease duct wrap. 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. In all areas exhaust vents should be at least 1 foot above roof surface.

Make sure the hood is level. A listed grease collection system that is in accordance with section 510 9 1 4 and section 510 9 1 5. Roof deck to top of exhaust fan windband 40 min. For applications where the 10 horizontal distance cannot be met separation between exhaust and supply must be at least 3 feet.

A grease collection device that is applied to exhaust systems that does not inhibit the performance of a fan. Exhaust collar and the roof curb cap must be welded to the exhaust duct. A listed grease duct in accordance with section 507 4 7 or ductwork in accordance with section 507 4 8. Location direction or nature of the exhaust.

Roof deck to top of curb 18 min. Ductwork installation by others 9.