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Posted by johnnymo on October 31, 2006, 4:25 pm
Awesome...good ideas. Idea is dead. Makes sense. I thought I was onto
to something, but as usual, there is a reason why it is not done this
way.
I was just testing you guys....jk. have a whole house fan, and the
minute I turn that sucker on, I can see it sucking the air from my
bathroom including the air in my exchaut fan vent when the fan is not
running.
Back to the drawing board. I appreciated every ones ideas and
suggestions. Seems like a really dumb idea now that I look back.
Peace.
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Posted by JoeSpareBedroom on October 31, 2006, 4:32 pm
>
> Awesome...good ideas. Idea is dead. Makes sense. I thought I was onto
> to something, but as usual, there is a reason why it is not done this
> way.
>
> I was just testing you guys....jk. have a whole house fan, and the
> minute I turn that sucker on, I can see it sucking the air from my
> bathroom including the air in my exchaut fan vent when the fan is not
> running.
>
> Back to the drawing board. I appreciated every ones ideas and
> suggestions. Seems like a really dumb idea now that I look back.
>
> Peace.
>
Call a roofer or two or three and find out what it could cost to have a
proper vent installed. It might be cheaper than you think.
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Posted by Chris Lewis on October 31, 2006, 4:37 pm
> Call a roofer or two or three and find out what it could cost to have a
> proper vent installed. It might be cheaper than you think.
Another approach is to run tubing/hose from the bathroom vent to the
eaves, and face the outlet _down_ thru the soffit.
Prevents warm air siphoning, no wall rework required.
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.
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Posted by Randy on October 31, 2006, 4:40 pm
johnnymo wrote:
> Thanks Grandpa.
>
> So, what is the difference in hooking up a sink to the side of the
> sewer vent than hooking up a piece of flex hosing that goes down.
>
> Maybe the trap? Is it b/c there is always water/gunk in the trap not
> allowing the gases to go up through the sink?
>
> My exhaust fan hose is always going to be dry so that would be a
> problem. Hmm....maybe not such a good idea?
That would be the exact reason, sink drains have traps to prevent sewer
gas from entering the room.
The fan connection to the DWV vent pipe not only violates code(s), its
a plain Bad Idea as stated by others. Aside from a low pressure
conditon in the building (think kitchen exahust fan, opening a well
sealed outside door with all the windows closed, the aforementioned
fireplace or wood stove) causing sewer gas to be drawn in when the fan
is not operating, it is possible (though less likely,) that with the
bathroom fan operating, it is conceivable that the positive pressure
introduced by the fan could have an adverse affect on one of the drain
trap's contents, should the vent outlet become (partially or fully)
obstructed, say be snow. I admit, this is a long shot, but you are
looking for reasons why this is a Bad Idea, that's another.
I'll echo what a previous poster said - make sure the fan exhaust makes
it outside. Don't let it loose inside the attic. You'll be asking for
moisture trouble.
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Posted by Pat on October 31, 2006, 5:57 pm
johnnymo wrote:
> Thanks Grandpa.
>
> So, what is the difference in hooking up a sink to the side of the
> sewer vent than hooking up a piece of flex hosing that goes down.
>
> Maybe the trap? Is it b/c there is always water/gunk in the trap not
> allowing the gases to go up through the sink?
>
> My exhaust fan hose is always going to be dry so that would be a
> problem. Hmm....maybe not such a good idea?
Here's something to think about. Know why managers of large commercial
buildings have ALL the floors mopped routinely -- even in areas that
are never used? It's to keep the floor drains wet so they don't stink
(seriously). They also make floor drains with "drippers" built in that
connect to a water line. They drip to keep the trap wet.
I guess all I can add to this is to cut the pipe open, take a good
whiff, and see what you think.
BTW, what you are proposing is known to happen in larger applications,
but they use a mechanically ventilated pipe so there's no back draft.
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