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Old 01-03-2010, 06:02 PM   #16
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Just so I get this straight- the first pic is your neighbors' exhaust/intake and the second pic is your exhaust? If I am understanding you correctly, you want the "baffle"- as you call it- like in the first pic? If I am correct, then you are misinformed as to what the function of the end of your neighbors' venting is- the exhaust goes straight out the end, and the combustion air is drawn in around the base of the cone.

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Old 01-03-2010, 06:08 PM   #17
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You may be recirculating the exhaust gases back into the intake air supply and that is HARMFUL to the furnace. Like shooting your car exhaust pipe into the air supply for your car motor. Will corrode your burners etc and possibly damage the heat exchanger. It needs to be fixed properly!
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Old 01-03-2010, 06:10 PM   #18
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bellaboob.

Get rid of that 45.
And run a temp vent like I said.

The concentric cover, is removable. And can be replaced.

But, at this time. They don't fail. Its not a consumable part. It as a rule doesn't wear out.

PS: As you have it now. You may very well be shortening the life of your furnace. As it isn't burning as clean as it should. Since its always drawing some exhaust back in.
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Old 01-03-2010, 06:10 PM   #19
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Quote:
Originally Posted by hvac benny View Post
Just so I get this straight- the first pic is your neighbors' exhaust/intake and the second pic is your exhaust? If I am understanding you correctly, you want the "baffle"- as you call it- like in the first pic? If I am correct, then you are misinformed as to what the function of the end of your neighbors' venting is- the exhaust goes straight out the end, and the combustion air is drawn in around the base of the cone.
You are correct: 1st pic = neighbors, 2nd pic = my two year old hack.

I'm not misinformed (unless you read that in the thread somewhere). I understand that the inner pipe is exhaust, outer pipe is intake. I think I always knew that. The precise function and type of venting was not known.
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Old 01-03-2010, 06:13 PM   #20
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So the second pic is your exhaust? Where is the intake? Is it direct vent?
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Old 01-03-2010, 06:14 PM   #21
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Bella: I would put 2 self tapping sheet metal screws into your new replacement hood, thru the inner pipe so no one steals it. Cover them with white silicone so they don't rust, get noticed by thieves.

Last edited by yuri; 01-03-2010 at 06:18 PM.
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Old 01-03-2010, 06:15 PM   #22
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Quote:
Originally Posted by hvac benny View Post
So the second pic is your exhaust? Where is the intake? Is it direct vent?
What your seeing is his concentric vent pipe covered with a 45.
The exhaust is in there. Along with that ell being part of the intake.
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Old 01-03-2010, 06:18 PM   #23
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VERY BAD. Will corrode the heck out of everything.
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Old 01-03-2010, 06:20 PM   #24
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Ok, I think I got it now, lol. I though the black around the 45 was a gasket, not a hole.

Last edited by hvac benny; 01-03-2010 at 06:24 PM. Reason: mis interpreted the pic
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Old 01-03-2010, 06:38 PM   #25
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I removed the 45 (never glued it on). It's probably better that way anyhow.

When the house was built, the deck had to be "moved" from the planned position due to setbacks. This placed the deck over the concentric vent on the exterior of the home. The vent had to be exposed through the deck hanging joist, but it was too close to the decking itself and prevented the "baffle" from being mounted (the contractor "kindly" left the cover under the finished deck where it stayed for a couple of years).

Two years ago, we demo'd the deck. The concentric vent was now exposed, but sometime in the three years before the new deck, I removed the vent cover from under the old deck and misplaced it (I don't think it was stolen, as much as thrown away).

Any misunderstanding on my part about the purpose for the vent was not the operation of the exhaust and intake piping, but the need for the "baffle cover" (or CV termination hood). After the deck demo, my uncle and I cut the exposed piping flush to the house and put the 45 on. Prior to our cutting, the piping was just two PVC pipes, the inner about 2 or 3 inches longer than the outer, something like:

=======
<------- intake
==================
-------> exhaust
==================

=======


All said, this has been the situation for 5 years. It was never properly terminated.

We only ever experienced a problem when we had high winds (@beenthere lives in the area, only 40 miles from me), and it has been windy for 48 hours plus.

I know what needs to be done.

Thanks everyone!

Last edited by bellaboob; 01-03-2010 at 06:56 PM. Reason: grammar
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Old 01-03-2010, 06:48 PM   #26
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Too bad I'm in Canada- I actually have the concentric termination cone in my van (one of my co-workes did somthing with the outer pipe, so the kit as a whole is useless). Good luck finding a new one.
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Old 01-03-2010, 06:53 PM   #27
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Good luck selling a mid Benny. LOL. All 90% or higher or electric now. Fun times ahead.
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Old 01-03-2010, 06:58 PM   #28
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LOL, Maple Ridge, BC is still allowing mids to be installed in NEW constuction! How crazy is that?
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Old 01-03-2010, 07:04 PM   #29
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Should anyone reading this have a "spare" CV termination hood (for reasons not unlike @hvac benny mentioned), I would be very interested... naturally.

My CV has 4" O.D. (intake). The exhaust has 2.25" O.D., so it's probably measured 2" I.D.

Last edited by bellaboob; 01-03-2010 at 07:26 PM. Reason: Add diameter of exhaust
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Old 01-03-2010, 07:30 PM   #30
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Benny, it is a FEDERAL law, the 90%. BC has to follow that I would believe. (Current inventory can be used up/installed). I'll send you some -32C later.

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