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  #1  
Old 3/11/10, 10:14 AM
John F. Swygert, III John F. Swygert, III is offline
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Default Flex Duct Firewall Breach

Guys, I see this all the time and need some clarification. Furnace located in garage with flex duct supply and return going through the garage wall and ceiling. I know flex duct is combustable however it's approved for use as furnace ductwork. But it's my understanding that ducts from house to garage must be min. 26ga. metal. Is this a breach??? How would you write it up? Many Thanks in advance.
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  #2  
Old 3/11/10, 10:33 AM
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Joe Funderburk, CMI Joe Funderburk, CMI is online now
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Default Re: Flex Duct Firewall Breach

I don't think I've ever seen it unless the furnace is in a separate room with a solid door. If it wasn't, I would definitely write it up.

Put up a photo.



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  #3  
Old 3/11/10, 2:50 PM
Matt Berman, CMI Matt Berman, CMI is offline
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Default Re: Flex Duct Firewall Breach

in michigan should be 26 gauge metal and have a fire damper in both supply and return
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  #4  
Old 3/11/10, 4:18 PM
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Jeffrey R. Pope, CMI Jeffrey R. Pope, CMI is offline
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Default Re: Flex Duct Firewall Breach

I see it often. . .

Flexible ducting is penetrating the garage firewall. Building standards require that all ducts in the garage and ducts penetrating the firewall be equipped with fire-dampers or constructed of a minimum of No. 26 gauge sheet steel or other approved material and shall have no openings in the garage. This condition compromises the garage firewall system and should be repaired by a qualified HVAC contractor for safety.



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Last edited by jpope; 3/11/10 at 4:23 PM..
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  #5  
Old 3/11/10, 4:44 PM
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Default Re: Flex Duct Firewall Breach

I see Studor vents occasionally.

Flex Duct Firewall Breach-030910-121-jpg



“The things that will destroy America are peace at any price,
prosperity at any cost, safety first instead of duty first,
the love of soft living, and the get-rich-quick theory of life.”
Theodore Roosevelt


Joe Funderburk, CBO, CMI
Alpha & Omega Home Inspections, LLC
Inspecting Upstate SC & Charlotte Metro, NC
Angie's List Super Award Winner 2016, 2015, 2014, 2013, 2012, 2011, 2010.
Ph: 704-351-1776
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  #6  
Old 3/11/10, 4:56 PM
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David P. Valley David P. Valley is offline
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Default Re: Flex Duct Firewall Breach

I call out all breaches in garage walls and ceilings that divide the living area from the garage...

Flexible ducts, any type of openings in the firewall (even the seams that aren't compounded), cable and wiring openings, etc.

If the firewall is open (breached) in any way, it gets red flagged.
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  #7  
Old 3/11/10, 7:44 PM
John F. Swygert, III John F. Swygert, III is offline
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Default Re: Flex Duct Firewall Breach

Outstanding response. Thanks so much to all. Thats what i thought but I am seeing this weekly in 500K homes. Will take and add photos next chance.
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