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Background: location: Philadelphia 11 story building-condos trash chute and recycle chute traverses all 11 floors three exhaust systems on floors-toilet, dryer and kitchen to a common duct chase up to 3 roof fans. Owner (and owner's engineer) wants to exhaust the trash / recycle chutes with...

JMartinH (Specifier/Regul) 11 Jun 07 12:53 (Just to add a little more grease to the fire, do these prefab ducts/flues require chase enclosures?) I read, the above thread, as a "B" vent application.

Design parameters: Grease duct from commerical business (restaurant) on first floor up through building located in Philadelphia, PA. Using chase with 0" clearance. Fire wrap requirements proposed by client- O"clearance using a product whichs is 1/2" thick. I never heard of a product that...

Location; Philadelphia, PA High rise building-condo units with retail @ 1st floor. Owner has supply air to the corridors from roof top unit serving floors 2 through 11 discharged at one central location ( at the floor's elevator lobby). All condos have three types of exhaust; kitchen, toilet...

Job conditions are as follows: City of Philadelphia, PA 11 story bldg. 6-8 condos per floor. commercial/ retail space on first floor-drug store and restuarant. basement-parking garage. Owner wants the dryer ductwork to exhaust via fire rated chase ductwork up to the roof. Ductwork will be...