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March 6, 2004, 12:00am
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Originally Posted By: jgallant This post was automatically imported from our archived forum.
Is there a standard minimum distance and height combination that a gas appliance “B” vent needs to be from an openable window to prevent exhaust gasses from entering living spaces? A house I inspected today, built in 1993, had a “B” vent terminate level with the bottom edge of upstairs windows, 5 feet from an openable hallway window and 6 feet from an openable bedroom window. Seems like an obvious risk of CO poisoning to me.
--www.allpointinspections.com
www.reporthost.com
system
March 5, 2004, 12:00am
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Originally Posted By: dvalley This post was automatically imported from our archived forum.
Jim,
This B-vent should be 8 feet away from any vertical wall and two feet above. B-vents should never terminate near window openings.
This vent is in violation of the 3-2-10 rule anyways. It's too short.
--David Valley
MAB Member
http://www.masscertified.com
system
March 5, 2004, 12:00am
3
Originally Posted By: jgallant This post was automatically imported from our archived forum.
dvalley wrote:
Jim,
--www.allpointinspections.com
www.reporthost.com
system
March 5, 2004, 12:00am
4
Originally Posted By: jpeck This post was automatically imported from our archived forum.
David,
The 3-2-10 rule does not apply to B vents with B vent caps. With unapproved caps or vents, yes, 10 feet applies.
8 feet from the wall or 2 feet higher than it for listed B vent sizes 12" and smaller.
Don't know of anything addressing windows, maybe because it is already required to be 8 feet from any wall ...
--
system
March 6, 2004, 12:00am
5
Originally Posted By: jgallant This post was automatically imported from our archived forum.
Where does the “8’ away” or “2’ above” rule come from? In case someone calls me on this. NFPA? IRBC?
–www.allpointinspections.com www.reporthost.com
system
March 6, 2004, 12:00am
6
Originally Posted By: tallen This post was automatically imported from our archived forum.
Jim,
It is IRC [2426.6.5] and UMC {806.4}
--www.whiteglovehomeinspections.net
system
March 6, 2004, 12:00am
7
Originally Posted By: jpeck This post was automatically imported from our archived forum.
Also comes from the manufacturers installation instructions.
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