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Old 01-31-2012, 04:11 PM   #1
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Venting a dryer in a chimney


I want to vent my dryer into my chimney, but am worried about lint building up.

Can I just put a duct filter to trap the lint?

The chimney is only used to vent gas appliances, but still, I don't want to fill it with lint.

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Old 01-31-2012, 04:23 PM   #2
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Venting a dryer in a chimney


You can't just put a filter on the line - you will clog up the line to the dryer. Dryer vents need to be free flowing with no obstructions (like screws or screens) for lint to collect.

I think your only choice, and probably only code-legal option, is to vent the dryer outside properly on its own line.

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Old 01-31-2012, 04:27 PM   #3
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Venting a dryer in a chimney


Please do not vent the dryer into the chimney.

Where is the dryer located? Why can't you go out a wall?
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Old 01-31-2012, 05:00 PM   #4
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Venting a dryer in a chimney


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Please do not vent the dryer into the chimney.

Where is the dryer located? Why can't you go out a wall?
Center of the room in the basement. The layout is tight, but it is the only way I could fit a bathroom, a kitchen/laundry (technically one room), a bedroom and a living room all in my basement (plus the boiler, hot water heater, ect)

Big problem is that the basement has a bunch of columns that hold up the house, and HUGE chimney, and a staircase. There aren't many ways to layout the room.

What about just using a screen instead of a filter? More airflow, should still catch a lot of lint?
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Old 01-31-2012, 05:25 PM   #5
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Venting a dryer in a chimney


Just forget about that idea. Totally illegal, a fire hazard, may cause a fire or reliece toxic fumes.
That dryer never should have been installed in the middle of the house, long runs for venting are a sure way to have trouble.
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Old 01-31-2012, 07:28 PM   #6
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Venting a dryer in a chimney


What about something like this?

http://www.amazon.com/Dundas-Jafine-...p_ob_e_title_0
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Old 01-31-2012, 07:33 PM   #7
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Venting a dryer in a chimney


Hmm hot moist air blowing into the basement, not a great idea.
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Old 01-31-2012, 08:00 PM   #8
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Venting a dryer in a chimney


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Hmm hot moist air blowing into the basement, not a great idea.
Yeah - you could run a vent fan, but then it's pretty much the same as venting it in the chimney with a screen.
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Old 01-31-2012, 08:05 PM   #9
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Venting a dryer in a chimney


ther should be a way to get that dryer vented to the out side wall...you may need to get a professional out for a look..Ben yes forget about the chimney
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Old 01-31-2012, 08:32 PM   #10
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Venting a dryer in a chimney


Lint is only one of the problems to overcome. The othe two are CO and moisture. Moist air venting into the chimney at that level will cause sweating and staining of walls when it condenses out. The bigger and potentialy deadly problem is when the dryer is venting into the chimney. The dryer vents with pressure. This presure in the chimney will disrupt the natural draft that other appliances need to function properly and draw out deadly CO. Whenever the dryer is running the furnace and water heater will potentialy be venting into the house
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Old 01-31-2012, 09:12 PM   #11
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Venting a dryer in a chimney


Does natural gas make enough CO to matter? My fireplace isn't even vented, either is my stove.

I know gas increases co2 and I think it depletes oxygen, but I thought co was only really an issue with wood?
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Old 01-31-2012, 09:17 PM   #12
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Venting a dryer in a chimney


If I did run a duct, any idea how big it would need to be? I could put one between the joists, but it's like a 10 foot run - I'm afraid it condenses in the duct and drips down.

Can you vent into 4" PVC? Because I could exhaust into PVC and slope it so the condensation ran either outside or into the plumbing.
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Old 01-31-2012, 10:16 PM   #13
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Venting a dryer in a chimney


People DIE quite often from CO related gas appliances - usually furnaces. Natural gas is probably the #1 CO killer.

You can't use pvc. The static generated will cause lint to stick. 4" metal ducting is the way to go. I don't think a 10' run would be much of a problem. If concerned about condensation, slope the duct appropriately.
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Old 01-31-2012, 10:20 PM   #14
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Venting a dryer in a chimney


And you can insulate it also
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Old 01-31-2012, 10:45 PM   #15
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Venting a dryer in a chimney


Just have to repeat, it's so important: only smooth-wall metal duct- 4" minimum, it's own use, foil tape the joints- no screws, use a Type "A" termination hood for 50% more air-flow there: http://www.appliance411.com/faq/dryer-vent-length.shtml

Exhaust +3' from other house openings- pp.31-33; http://www.ci.broomfield.co.us/build...andout0308.pdf

Basics: http://www.ashireporter.org/articles...es.aspx?id=161

Just the facts; http://www.ashireporter.org/articles...es.aspx?id=161

Number 10 of the "Top 10": http://www.buildingscience.com/docum...ong-from-start

Gary

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