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-   -   multiple ventings into an old chimney (http://www.diychatroom.com/f47/multiple-ventings-into-old-chimney-79974/)

forresth 08-29-2010 06:19 PM

multiple ventings into an old chimney
 
I'm fixing up my "new"house to move into. The basement isn't the most fun of places to get into, and the kitchen is rather large, so we are planning a stacked washer/dryer in the kitchen, next to the stove.

There is an old, now unused chimney off the kitchen, once used for the old woodburning ovens. would there be any problems with venting a gas dryer (or electric, leaning toward gas ATM) and a range hood both into the old chimney?

seams like there might get a buildup of greasy lint, but that shouldn't be a problem because the chimney is not in use.

Anyone see a problem with what I am planning?

1910NE 09-16-2010 09:20 PM

i think you would need to put a liner in the chimney...

Jacques 09-17-2010 05:04 AM

hope you haven't done this yet. there's all kinds of problems with this..code vio, blow back, fire hazard,etc.

forresth 09-17-2010 09:32 AM

how would this be a fire hazzard? and what would be the point of a new liner?

Jacques 09-18-2010 09:37 AM

wet air from the dryer will deteiorate[sp]the chimney's old lining if it's not sealed. you'll build up greasy lint which could ignite, w/o a check plate either one will blow into the other. by code you can't do this; so if there was a fire or something the ins co would refuse to pay.

forresth 09-18-2010 11:23 PM

I can't see how wet dryer air would be much worse than rain?
I know the combustion gasses can be a bit corosive, but they should be a fairly small component of the gasses being vented fromm a dryer. even if it is horibly corosive, its going to take quite some time to eat through the old liner, the masonry, and the bricks. I guess when it comes right down to it, the only purpose the chimney serves (or will ever serve again if I don't vent to it) is cosmetic.

I guess I can skip the range vent, but the dryer has to be vented, and its sitting quite near the old chimney opening.

do you happen to know what section of code you are refering to so I can look it up?

Gary in WA 09-19-2010 10:14 PM

4” metal pipe, smooth interior finish, exhausted outdoors, back-draft damper: http://www.hcpdc.com/pdf/Dryer%20Ven...quirements.pdf

Range hood- smooth interior finish, exhausted outdoors, back-draft damper, metal, s.s., or copper duct: http://docs.google.com/viewer?a=v&q=...up65cYgFwMvULw

Gas dryer: http://www.dpis.com/News/2008_11.pdf

Gary

forresth 09-19-2010 10:36 PM

Quote:

Originally Posted by GBR in WA (Post 504034)
4 metal pipe, smooth interior finish, exhausted outdoors, back-draft damper: http://www.hcpdc.com/pdf/Dryer%20Ven...quirements.pdf

Range hood- smooth interior finish, exhausted outdoors, back-draft damper, metal, s.s., or copper duct: http://docs.google.com/viewer?a=v&q=...up65cYgFwMvULw

Gas dryer: http://www.dpis.com/News/2008_11.pdf

Gary

I had no idea a gas dryer vent could be 25' long :eek:

seams like a much greater firehazzard than what I was considering, but it does give me a little more flexability in routing, and might let me reuse an old vent. My primary goal was to avoid ANOTHER hole in the house.


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