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Dryer Vent Duct In Garage

 
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Old 11-14-2017, 05:53 PM   #1
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Dryer Vent Duct In Garage


Short version. Looking at moving a dryer vent duct that exits out of a roof which is a poor setup. Vent would go into the garage, turn and run along a wall, and then turn again and exit out the sidewall. I know there are condensation issues with a setup like this, but I'd think if it was air sealed and insulated correctly it should be ok. Any thoughts or code issues anyone can think of. Thanks, Nick.
Oh yeah, I'm looking for my damn code books but can't track them down
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Old 11-14-2017, 05:57 PM   #2
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Re: Dryer Vent Duct In Garage


Keep it going through the roof, add a booster fan and use a roof boot meant for a dryer for unrestricted flow. Insulate the ducting in the attic.

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Old 11-14-2017, 06:03 PM   #3
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Re: Dryer Vent Duct In Garage


How long is the proposed run through the garage?

Are there lint build-up issues with roof caps?

Last edited by MarkJames; 11-14-2017 at 06:06 PM.
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Old 11-14-2017, 06:11 PM   #4
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Re: Dryer Vent Duct In Garage


Quote:
Originally Posted by Morning Wood View Post
Short version. Looking at moving a dryer vent duct that exits out of a roof which is a poor setup. Vent would go into the garage, turn and run along a wall, and then turn again and exit out the sidewall. I know there are condensation issues with a setup like this, but I'd think if it was air sealed and insulated correctly it should be ok. Any thoughts or code issues anyone can think of. Thanks, Nick.

Oh yeah, I'm looking for my damn code books but can't track them down


Did the same exact thing at my house. No issues at all with any condensation and it's been up for a few years. I passed it when I inspected it too


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Old 11-14-2017, 06:15 PM   #5
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Re: Dryer Vent Duct In Garage


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How long is the proposed run through the garage?

Are there lint build-up issues with roof caps?
We had lint build up using a Broan roof flashing. Switched to a DryerBox brand and the flow was.much improved.
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Old 11-14-2017, 06:21 PM   #6
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Re: Dryer Vent Duct In Garage


Well, the current hood on the roof is just a standard vent hood. Itís not good for the dryer at all. In fact it started leaking yesterday and damaged a bunch of their garage drywall. Leak on the roof at the vent with rain. The setup is crappy to begin with. Itís literally impossible to clean without me getting involved.

Over, are you talking dryer box vent hood?

And I did find my code book. Canít find anything other than they want 26 gauge duct.
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Old 11-14-2017, 06:26 PM   #7
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Re: Dryer Vent Duct In Garage


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We had lint build up using a Broan roof flashing. Switched to a DryerBox brand and the flow was.much improved.

Do you mean dryer jack brand?

Never mind. I see they are the same company. That might be a good option.

Last edited by Morning Wood; 11-14-2017 at 06:46 PM.
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Old 11-14-2017, 06:56 PM   #8
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Re: Dryer Vent Duct In Garage


Nothing wrong with running the vent through the garage as long as everything's sealed up properly. But it sounds like a pretty long run, especially with a couple of elbows involved.

25' max; each elbow counts for 2.5'. Yeah, it would be a pain to clean.
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Old 11-14-2017, 07:33 PM   #9
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Re: Dryer Vent Duct In Garage


I'd prefer a garage run. If you ever have a fire start, It's in a rated area.

Leaf blowers are your friend for clean out.
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Old 11-14-2017, 07:36 PM   #10
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Re: Dryer Vent Duct In Garage


Actually the run in the garage would be less than 25' even with the 2 90's. I'm going to get a dryer jack roof hood and try that. It will be much easier installing it with the drywall ripped off as well. I'll make everything rigid pipe, as right now there is a short piece of flex duct up in the attic. That really sucks and isn't a great thing. If this ends up not working then I'll go to the garage duct.
In terms of cleaning I use one of those cleaning kits on my house. I have rigid pipe with the dryer box 90's. The cleaning brush and a vacuum work really well. I just have to clean from both ends on mine. With my client should be able to just clean from the dryer side. Think I'll also install a dryer box for the stacked unit they run as well. Will make the hook up easier.
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Old 11-14-2017, 08:04 PM   #11
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Re: Dryer Vent Duct In Garage


In my experience, lint tends to be a bit sticky. While a leaf blower will get some of it out, the brush/vacuum combo does a much better job.
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Old 11-14-2017, 08:07 PM   #12
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Re: Dryer Vent Duct In Garage


Quote:
Originally Posted by Morning Wood View Post
Well, the current hood on the roof is just a standard vent hood. Itís not good for the dryer at all. In fact it started leaking yesterday and damaged a bunch of their garage drywall. Leak on the roof at the vent with rain. The setup is crappy to begin with. Itís literally impossible to clean without me getting involved.

Over, are you talking dryer box vent hood?

And I did find my code book. Canít find anything other than they want 26 gauge duct.
Yes the DryerJack. The one I did was a second floor dryer in the middle of a large building. I had no other option but up. The run was short but I felt the cold attic was causing issues in the airflow as well. (Cold air meets hot air) That is why I wrapped the duct with duct insulation and installed the booster. The Broan flashing had a rodent screen and that did clog with lint. The DryerJack didn't have the screen and the radius of the unit was designed for maximum flow.
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Old 11-14-2017, 11:02 PM   #13
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Re: Dryer Vent Duct In Garage


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Originally Posted by Tinstaafl View Post
In my experience, lint tends to be a bit sticky. While a leaf blower will get some of it out, the brush/vacuum combo does a much better job.
I use a 32cc one, it gets most out. If you can get a brush through, You'll get more out, but right angles can be a problem.

Worst I dealt with was made from downspout, had 3 turns, and some mouse or something had filled it solid for 10 feet with long grass, leaves, sticks...

I had to use a drain auger and take it out bit by bit.
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Old 11-15-2017, 01:20 PM   #14
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Re: Dryer Vent Duct In Garage


Found the problem. Excessive moisture rotted it right out. Going to redo with rigid insulated pipe and the dryer jack hood. And get the owners to actually clean the damn thing. Still not happy about going out the roof though.


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Old 11-27-2017, 03:58 PM   #15
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Re: Dryer Vent Duct In Garage


Iím posting this question at the risk of getting burnt here I know. What do you guys use to insulate dryer duct? I thought I had some 4Ē duct insulation with foil exterior, but I only have 6Ē. I do have 4Ē insulated flex duct, and Iím considering pulling the flex duct out of the insulation and using just the Insulation part to insulate my rigid duct. But it has a poly shell on the outside and not foil which makes me a little uncomfortable for a dryer vent.
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Old 11-27-2017, 07:53 PM   #16
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Re: Dryer Vent Duct In Garage


We have a big roll of the foil faced duct insulation. We just cut off what we need to wrap any size pipe.
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Old 11-27-2017, 09:35 PM   #17
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Re: Dryer Vent Duct In Garage


Maybe we are talking about 2 different things. The duct insulation I use is basically fiberglass with a foil cover over it. Is that what you use, or do you use full foil faced Insulation?

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