Grease Duct-NFPA code requirements
Grease Duct-NFPA code requirements
(OP)
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 thin being used in this type of application,I don't know of anything like it, is there such an animal out there?
My understanding of NFPA code in this application is a MINIMUM of 2" fire wrap for 0"clearance.
Thanks for you help, it is appreciated !
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 thin being used in this type of application,I don't know of anything like it, is there such an animal out there?
My understanding of NFPA code in this application is a MINIMUM of 2" fire wrap for 0"clearance.
Thanks for you help, it is appreciated !





RE: Grease Duct-NFPA code requirements
I find their interpretations quite useful.
http://www.eng-tips.com/threadminder.cfm?pid=184
RE: Grease Duct-NFPA code requirements
CB
RE: Grease Duct-NFPA code requirements
NFPA allows products listed for reducing clearance to combustibles to be used. They have to be tested to a nationally recognized standard.
Once the 2006 IMC becomes law the FireWrap products will be installed in two layers.
The Flambar product mentioned earlier has ONLY been tested for air ducts to an European standard. If it is to be used for grease ducts it also needs to have mineral wool added to the outside and is thicker than the the above mentioned wrap and also gets expensive. The grease duct test is different from the 2Hr shaft alternative listing (inside vs outside fire threat).
RE: Grease Duct-NFPA code requirements
Selkirk metalbestos makes the product, round duct, easy to clean etc.
http://www.selkirkinc.com/zeroclear/home.htm
RE: Grease Duct-NFPA code requirements
"Zero Clearance to combustibles can be achieved with 1.5" of FireMaster FastWrap+ per the UL 1978 Test which is accepted by NFPA96 and the IMC 2003 or earlier."
Great product and approved for use in Los Angeles.
RE: Grease Duct-NFPA code requirements
RE: Grease Duct-NFPA code requirements
RE: Grease Duct-NFPA code requirements
(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.
RE: Grease Duct-NFPA code requirements
RE: Grease Duct-NFPA code requirements
Page 21 of http://ww