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fuzbutz4 11-21-2009 03:55 PM

dryer vent
Is it "really" ok to vent a dryer inside the house?

Bob Mariani 11-21-2009 04:52 PM

nope, should vent to the outside.

Scuba_Dave 11-21-2009 04:53 PM


Originally Posted by fuzbutz4 (Post 356196)
Is it "really" ok to vent a dryer inside the house?

Electric or gas dryer ?

Bob Mariani 11-21-2009 06:31 PM

either one will add too much humidity to the room so it still should vent outside.

Scuba_Dave 11-21-2009 06:33 PM

I heat a lot with wood, so the added humidity is better then running a humidifier
Even with the dryer my wife will still want to run a humidifier

Daniel Holzman 11-21-2009 10:21 PM

I installed a diverter, purchased at Ace Hardware (this is not an advertisement). Cost about $10, very nice, consists of a plastic housing with a flap valve that can be turned to vent either outdoors in the summer or inside in the winter. I too heat with wood, the extra humidity is not a problem in the winter, and you recover a large amount of heat that otherwise would go out the vent. The vent includes a flange to install a nylon sock over, this captures any lint that makes its way past the lint screen in the dryer.

Good point about the gas dryer, they are clearly not a candidate for indoor venting. I have an electric dryer.

From what I have read, the issue with indoor venting appears to have nothing to do with the moisture,which as previously noted may be beneficial in the winter, but is related to the potential for lint buildup in the lint capture device (the sock), which can lead to reduced air flow, back pressure, and potentially a fire. This is similar to the issue of poor dryer venting due to use of excessively long runs, flexible hose, or smooth pipe with sheet metal screws.

I have not seen any regulations that specifically prohibit the practice of indoor venting, however if you are going to do it (as I do), you had better check and clean the lint trap frequently. I heat with wood, and am familiar with the need to get my chimney cleaned and inspected periodically, so I am not too worried about forgetting to clean the lint trap, but if you are the forgetful kind, probably best not to vent indoors.

Gary in WA 11-21-2009 11:26 PM

I sure hope you edit your posts and say they are electric dryers. Gas dryers should never be vented (read exhausted) indoors. The combustion by-products need to go outside with the lint residue.

Duct termination: End outside in backdraft damper & no screens {1501.1, 2437.3}
Minimum 3' from other building openings [504.5]

That is all dryers! As Bob said. Duct must be smooth metal inside, with no screws. Why is that? Screws catch lint, metal doesn't melt like plastic when it burns! Please do not vent a dryer inside -- it is against the minimum fire code and common sense!

Read this article--- 13 deaths a year, let's not add to that because of poor advice:

Be safe, Gary

DUDE! 11-22-2009 08:19 AM

I tried venting an electric dryer inside once, used a model that required hose connecting to a bucket that held water to trap the lint, took me a while to figure out why my tools in the location of the dryer all had a coat of rust on them. I try to concentrate on other areas to conserve energy.

Scuba_Dave 11-22-2009 08:36 AM

Yes - electric dryer & lint trap
Mine does not divert 100% to inside, it only part of the output
And if you aren't monitoring the humidty level you will get rust
If I didn't burn wood (or have a very dry house) I would not do it

Bob Mariani 11-22-2009 08:40 AM

Why are you burning wood in the hot humid summer days? Or do you not dry clothes during these times?

Scuba_Dave 11-22-2009 08:59 AM

I think its the heating season right now
I don't know anyone that vents inside during the summer
That's pretty much common sense
Nor do I turn my heating system on to heat the house in the hot humid summer
Not that we really have much of a hot humid summer around here

DUDE! 11-22-2009 10:21 AM

Dave, I go with Bob on this one, I don't know why you want to burn wood in the summer, unless its so the kids can cook marshmellows :laughing:

cyhm 11-22-2009 12:09 PM

venting a dryer in an interior room
I bought a townhouse 4 1/2 years ago where I liked the floorplan with the exception of the location of the laundry room. It's a 56" wide space sandwiched between the garage and the family room. The furnace is at one end, then the washer and dryer and the doors leading to the garage and family room are at the other end. It's 25' from the electric dryer through the garage to the outside. I talked to a couple of hvac people about venting to the outside, but they said my town wouldn't allow it, that the distance with 3 or 4 90 turns was too long. The previous homeowner had been using one of those indoor lint traps from one of the home improvement centers that uses water to trap the lint, but in reality doesn't really catch all the lint. I was worried about breathing that in and kept the door to the laundry room closed when the dryer was running. After a couple of years, the paint in that room started peeling b/c of all the moisture from the dryer. I bought an indoor lint trap from Action Appliance ( for $46.90 which does a much better job at catching all the lint. Well worth the extra cost. It still uses water to trap the lint, but it's much easier to pull out the small drawer and keep it clean than anything else I've found. I also bought a Frigidaire 70-pt. dehumidifier which I run on the days I'm using the dryer. It's quiet; with the door shut, you can watch tv in the family room and not hear it over the low noise from the dryer itself. That's seems to have taken care of the moisture issue. There's still the extra heat from the dryer and dehumidifier, but I can live with that. It's not a perfect solution, but no one I've talked to has been able to come up with a better way to deal with my particular situation.

Scuba_Dave 11-22-2009 12:29 PM

I would think a booster fan to draw/push the dryer heat/moisture out would be better then running a dehumidifier
Most run at around 7a - same as running an AC
Not sure if a booster fan is allowed with a dryer ?

We did have some cold/wet weather in June this past year
So I did have a fire going, not sure if it was summer

Michael Thomas 11-22-2009 12:45 PM

The instructions for every electric dryer I've seen (except for condensing units) includes the following:

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