Grease Exhaust Height Above Roof

Install light bulbs supplied by others light globes and grease filters in the hood.

Grease exhaust height above roof.

A grease collection device that is applied to exhaust systems that does not inhibit the performance of a fan. Make sure the hood is level. From all exhaust fans. For applications where the 10 horizontal distance cannot be met separation between exhaust and supply must be at least 3 feet.

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. Fats oils and grease are discharged from your upblast hood exhaust fan and collects on your roof. Exhaust vents must be protected against rain and equipped with back flow prevention features e g flap dampers.

National fire protection association nfpa standard 45 specifies a minimum stack height of 10 ft to protect rooftop work ers. 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. Exhaust collar and the roof curb cap must be welded to the exhaust duct.

Roof deck to top of exhaust fan windband 40 min. 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. Rovide a light test for grease duct prior p to enclosing or concealing. Ductwork installation by others 9.

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. Provide a light test for grease duct prior to enclosing or concealing. One side is hinged with a flexible electrical connector for inspection and cleaning.

This creates a deadly fire hazard and liability for your business. Provide specifications and installation detail for the grease duct wrap. Roof deck to top of curb 18 min. A listed grease collection system that is in accordance with section 510 9 1 4 and section 510 9 1 5.

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. Show how one side is hinged with a flexible electrical connector for inspection and cleaning.