Furnace Flue

[Michael Larson]

I don't know but I don't seen why an offset would change the clearances.

Perhaps the question presenter will enlighten all of us.

[relliott]

Originally Posted by mlarson

I agree it could have been done better but even a calm day you are asking me to believe the the attic would somehow be at negative pressure while the building is being heated from below.

I don't see how that happens but I'm certainly willing to listen to a reasonable explanation.

Hmmm, you say it could have been done better.

What could have been done better and why?

Happy Thanksgiving.

[Joe Farsetta]

The answer it totally dependent on timing, and little else.

You can ask the question until the cows come home.

If the attic turbine vent was not installed at he time the b-vent was, then the answer is YES, the furnace vent was installed properly.

Judging from the appearance of one over the other, it appears the stack pre-dates the turbine.

Absent of further information, one can identify the existence of a problem, but the question is poorly worded (sorry Bob).

A problem exists, but may have nothing to do with whether the furnace vent was installed correctly.

Like I said... what came first: the chicken or the egg?

[Brian E. Kelly]

The question is worded fine Joe.

[relliott]

wrong is wrong
Chicken or the egg has nothing to do with it.

[Brian E. Kelly]

Joe has an excellent point as the question cleary asks about the furnace flue installation. I did not even think about that until he posted it. Very clever Joe, I will be interested as to how Barry sees it.

Good discussion so far.

[Barry Adair]

I have to agree with M.L. and noted as such this was not 3' above any roof surface but if it had been I wouldn't have noted anything. No evidence of problems and nothing to back it up, flue was pretty close to the 5:12 ridge.

btw: no backdrafting, spillage, roll-out or other issues were noted with the heat equipment associated with this flue and the entire BSL (Beyond Service Life) roof cover will be replaced and turbines will be replaced with continuous ridge venting.

Another question.

Will this retro-fit ridge venting system present new or the same issues for those that were in favor of mis-installation?

[Barry Adair]

I have to agree with M.L. and noted as such this was not 3' above any roof surface but if it had been I wouldn't have noted anything. No evidence of problems and nothing to back it up, flue was pretty close to the 5:12 ridge.

btw: no backdrafting, spillage, roll-out or other issues were noted with the heat equipment associated with this flue and the entire BSL (Beyond Service Life) roof cover will be replaced and turbines will be replaced with continuous ridge venting.

Another question.

Will this retro-fit ridge venting system present new or the same issues for those that were in favor of mis-installation?

[Dennis R. Goudreau]

Thanks Barry, boy was i way off base, good grief!!!!!!!

[John Shishilla]

Originally Posted by jkogel

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

I don't like code either, but have never called it crooked or rusty, old and nasty maybe.

[Barry Adair]

Originally Posted by dgoudreau

Thanks Barry, boy was i way off base, good grief!!!!!!!

Don't feel bad 182 views on this as of this posting and only one usable reply.

I've seen some ultra-bone-headed posts by many offering no help, me included. Thanks for trying. Some days I just ain't in the mood.

[jhugenroth]

This is from CA plumbing code:

517.5 Venting Termination
No vent system shall terminate less than four feet below or four feet horizontally from, nor less than one foot above any door, openable window or gravity air inlet into any building.


I don't think a turbine vent qualifies as an air inlet. For guys like Brian Kelly and myself who have evaporative coolers in our areas, they would qualify as a potential problem as they do draw air into the house.
But I think any potential backdrafting issues with a turbine would be negligible and not worth worrying about. Heat in the attic rises towards the peak and goes out through the turbine, whether or not it is spinning.

[jhugenroth]

Originally Posted by badair

Don't feel bad 182 views on this as of this posting and only one usable reply.

I've seen some ultra-bone-headed posts by many offering no help, me included. Thanks for trying. Some days I just ain't in the mood.

Hey Barry, if the 182 views were after BK's reply, then why would they respond?
I'll add one more. It is a T top or T vent. Now you've got two usable replies.

[Joe Funderburk, CMI]

I don't see how the turbine creates any different effect than normal wind, which swirls around a B-vent all the time.

[relliott]

source is PDF file

douglas-sarpy.unl.edu/pdf/environ_home_indoor_air_carbon_monoxide.pdf