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Inspecting HVAC Systems Topics include heating, venting, and air conditioning inspections.

 
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  #1  
Old 8/3/11, 6:06 PM
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Default Never seen this done before - stripped the outside off of flue

This furnace flue used to be double walled.
Not so much now.
Whoever installed it had a clearance issue with some ductwork, so they just stripped the outside wall off.
But why leave the spacers?
Just when I thought I'd seen everything.
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  #2  
Old 8/5/11, 11:18 AM
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Default Re: Never seen this done before - stripped the outside off of flue

It was most likely the asbestos insulation that surrounded the pipes. That was the reason it was removed.



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  #3  
Old 8/5/11, 11:21 AM
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Default Re: Never seen this done before - stripped the outside off of flue

Those are added radiators

They were quite popular a couple of decades ago.



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  #4  
Old 8/5/11, 10:47 PM
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Default Re: Never seen this done before - stripped the outside off of flue

Quote:
Originally Posted by mlarson View Post
Those are added radiators

They were quite popular a couple of decades ago.
Agreed



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  #5  
Old 8/8/11, 1:35 PM
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Default Re: Never seen this done before - stripped the outside off of flue

Quote:
Originally Posted by mlarson View Post
Those are added radiators

They were quite popular a couple of decades ago.
The first thing I thought was that they must be some kind of heatsink. But then I couldn't figure out what the advantage would be.
Were they trying to rust out the flue by making the exhaust gas condense? Because other than heating the immediate area I don't see any other purpose. And that'd only be if they worked well, which they didn't appear to do...
The old guy that was with me said that had seen double wall pipe stripped down before, and I looked at some pictures online where the spacers looked very similar to these, and the clearance did suck, so I figured he was right.
Dude was 85yrs old and still working as a PE. Was a master electrician and had been working as an electrician for 75yrs. That's right, since he was 10.
His dad died when he was 8.
Seemed like he knew what he was talking about.
Either way, I've never seen them before.



“Of liberty I would say that, in the whole plenitude of its extent, it is unobstructed action according to our will. But rightful liberty is unobstructed action according to our will within limits drawn around us by the equal rights of others. I do not add 'within the limits of the law,' because law is often but the tyrant's will, and always so when it violates the right of an individual.” - Thomas Jefferson
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  #6  
Old 8/8/11, 6:18 PM
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Default Re: Never seen this done before - stripped the outside off of flue

Really Andy they are add ons with the intention of saving wasted heat going up the Flue and as You noted not very effective...



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  #7  
Old 8/9/11, 10:35 AM
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Default Re: Never seen this done before - stripped the outside off of flue

Quote:
Originally Posted by jmckee View Post
Really Andy they are add ons with the intention of saving wasted heat going up the Flue and as You noted not very effective...
Well I'll be...
Just goes to show that even after all these years, there's still stuff I haven't seen.



“Of liberty I would say that, in the whole plenitude of its extent, it is unobstructed action according to our will. But rightful liberty is unobstructed action according to our will within limits drawn around us by the equal rights of others. I do not add 'within the limits of the law,' because law is often but the tyrant's will, and always so when it violates the right of an individual.” - Thomas Jefferson
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