HVAC duct

08-21-2012, 12:10 PM	#1
rgolf Newbie   Join Date: Aug 2012 Posts: 1	HVAC duct a 4 inch duct from the top of my HVAC unit extends up to the roof. What is it's function ? How long can this duct be to reach the roof? I live in So Calif.

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08-21-2012, 05:54 PM	#2
beenthere An old Tradesmen   Join Date: Oct 2008 Location: PA Posts: 18,642	HVAC duct Could be a fresh air intake pipe.

08-22-2012, 08:27 PM	#3
Acomfort Bchill   Join Date: Aug 2012 Location: Canada Posts: 93 Blog Entries: 1	HVAC duct If you can post a pic it would help us tell you what it is. __________________ Affordable Comfort, assisting with To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. and surrounding area, as well as offering 24 hour To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

08-22-2012, 08:38 PM	#4
Houston204 Member     Join Date: Oct 2009 Location: Texas Posts: 571	HVAC duct Is Type B stamped on it?

08-22-2012, 08:40 PM	#5
Acomfort Bchill   Join Date: Aug 2012 Location: Canada Posts: 93 Blog Entries: 1	HVAC duct That would be your exhaust __________________ Affordable Comfort, assisting with To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. and surrounding area, as well as offering 24 hour To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

08-22-2012, 08:54 PM	#6
Missouri Bound Member     Join Date: Apr 2011 Location: Almost Arkansas Posts: 2,764	HVAC duct My people call it "flue" __________________ Do you want it your way or the right way? To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

08-22-2012, 11:27 PM	#7
hvac benny Member   Join Date: Dec 2009 Posts: 547	HVAC duct Quote: Originally Posted by rgolf How long can this duct be to reach the roof?. That depends on how high your roof is.