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Question of the Day These are inspection questions posted daily by members of InterNACHI's Educational Committee.

View Poll Results: Is this forced air gas furnace flue properly installed?
Yes 4 17.39%
No 19 82.61%
Voters: 23. You may not vote on this poll

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  #1  
Old 11/25/08, 6:11 PM
Brian E. Kelly Brian E. Kelly is offline
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Default Furnace Flue

Courtesey of Barry Adair


Is this forced air gas furnace flue properly installed? YES NO
Please provide code or other references to back-up your answer.



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Last edited by bkelly2; 6/12/09 at 7:48 PM..
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  #2  
Old 11/25/08, 7:33 PM
jkogel jkogel is offline
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Default Re: Furnace Flue

Anyone can see it's too close to the turbine vent.
I don't do code.
It's crooked and rusty.

John Kogel
www.allsafehome.ca
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  #3  
Old 11/25/08, 9:42 PM
Ted Allen Ted Allen is offline
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Default Re: Furnace Flue

This is like a joke question..?
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  #4  
Old 11/25/08, 9:44 PM
Ted Allen Ted Allen is offline
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Default Re: Furnace Flue

Hmmm, actually if that is a roof vent.............. going out.......... Then it may very well be OK..
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  #5  
Old 11/25/08, 9:44 PM
Ted Allen Ted Allen is offline
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Default Re: Furnace Flue

I say it is OK, but the gas vent should be taller.
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  #6  
Old 11/25/08, 10:30 PM
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relliott relliott is offline
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Default Re: Furnace Flue

Tallen ,you are correct, as it needs to be 24 inches higher than anything within 10 feet if it is B vent.

Source is Carson Dunlop and Inspect NY.
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  #7  
Old 11/25/08, 11:12 PM
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Terry Neyedli Terry Neyedli is offline
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Default Re: Furnace Flue

Quote:
Originally Posted by bkelly2 View Post
Courtesey of Barry Adair


Is this forced air gas furnace flue properly installed? YES NO
Please provide code or other references to back-up your answer.
The wind turbulator appears to be recent install.
The "B" vent stack is too close to it.
Bad combination in any case.
Call it out as further assessment required.
Let the trades people figure it out.
I do NOT do code (reference), just common sense.

T.Neyedli
www.alphahomeinspections.ca
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  #8  
Old 11/26/08, 12:38 AM
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James F. McKee James F. McKee is offline
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Default Re: Furnace Flue

did You check out the lines on those shingles ????why does Barry keep posting pictures of the work he did on His own house ????



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Jim Mckee
Amherst, Ohio

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  #9  
Old 11/26/08, 11:08 AM
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Barry Adair Barry Adair is offline
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Default Re: Furnace Flue

Quote:
Originally Posted by jmckee View Post
did You check out the lines on those shingles ????why does Barry keep posting pictures of the work he did on His own house ????
jfy!



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  #10  
Old 11/26/08, 2:18 PM
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David C. Macy David C. Macy is offline
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Default Re: Furnace Flue

The top of the chimney must be 2' higher than anything within 10' of it.


Potential back draft problem.
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  #11  
Old 11/26/08, 3:12 PM
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relliott relliott is offline
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Default Re: Furnace Flue

So far there are 3 votes that this is ok, yet not one explanation for why.
Lets hear it.
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  #12  
Old 11/26/08, 3:32 PM
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Michael Larson Michael Larson is offline
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Default Re: Furnace Flue

Quote:
Originally Posted by relliott View Post
So far there are 3 votes that this is ok, yet not one explanation for why.
Lets hear it.
Hint:

The turbine is not combustible.

The turbine discharges air from the attic space.

The unavailable furnace mfgs. installation instructions rule.


Now let's hear why most think it is an improper install.



"Never underestimate the difficulty of changing false beliefs by facts."
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Michael Larson
Hudson, WI

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  #13  
Old 11/26/08, 3:41 PM
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relliott relliott is offline
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Default Re: Furnace Flue

Quote:
Originally Posted by mlarson View Post
Hint:

The turbine is not combustible.

The turbine discharges air from the attic space.

The unavailable furnace mfgs. installation instructions rule.


Now let's hear why most think it is an improper install.
Gave it to you already and the 24 inch rule applies, with minor modifaction for roof slope.

Show us Manufacturer that says I am wrong Mike.
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  #14  
Old 11/26/08, 3:51 PM
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Michael Larson Michael Larson is offline
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Default Re: Furnace Flue

Quote:
Originally Posted by relliott View Post
Gave it to you already and the 24 inch rule applies, with minor modifaction for roof slope.

Show us Manufacturer that says I am wrong Mike.
I try to approach these unusual situations from logic.

What is the potential hazard?

It may well be wrong but without a known hazard and lacking the installation docs, why?



"Never underestimate the difficulty of changing false beliefs by facts."
Henry Rosovsky-Harvard

Michael Larson
Hudson, WI

Services provided in East MN and West WI
InspectraPro
or
Minnesota Home Inspector

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  #15  
Old 11/26/08, 4:25 PM
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relliott relliott is offline
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Default Re: Furnace Flue

Quote:
Originally Posted by mlarson View Post
I try to approach these unusual situations from logic.

What is the potential hazard?

It may well be wrong but without a known hazard and lacking the installation docs, why?
NO NO Mike
You are answering a question with a question.

Your installation guides are all over the internet.
Argue with, them.

Find one that is different from what I referenced.

Why does a brick veneer wall need a one inch space rather than a 3/4 inch space? I do not know that either.

Ever hear of the 3-2-10 rule.? Me too, but I just write it up.

Gee ,am I being hard on this.

Seriously I would imagine there is something called back drafting , which may come into play.
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