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Old 01-28-2012, 09:51 PM   #1
quick60
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Default Galvanized duct for dryer vent?

Not really garage related but can galvanized duct be used for a dryer vent?

I have a 12 foot run to cover in my crawl space and did not want to use the flex hose if I did not have to. However the more I think about the moisture issue and even though it is galvanized it may still rust out.

Any thoughts?

Thanks
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Old 01-28-2012, 09:57 PM   #2
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Default Re: Galvanized duct for dryer vent?

Have you considered PVC?
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Old 01-28-2012, 10:10 PM   #3
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Default Re: Galvanized duct for dryer vent?

No I have not. That could work I guess. Fire hazard would be my only concern.
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Old 01-28-2012, 10:22 PM   #4
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Default Re: Galvanized duct for dryer vent?

I have seen it used . If it is behind a wall- it is used. It has been a few years since I was installing hvac, but it is what I remember.
I have also seen a telescoping style made out of sheetmetal (rectangular with couplings on the ends).

Last edited by DoyleDee; 01-28-2012 at 10:24 PM.
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Old 01-28-2012, 10:25 PM   #5
MN BIANCHI
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Default Re: Galvanized duct for dryer vent?

Galvinized is OK, it will take a long time to rust if ever.

PVC is NOT approved for dryer venting unless it is buried in concrete.
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Old 01-28-2012, 11:12 PM   #6
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Default Re: Galvanized duct for dryer vent?

Quote:
Originally Posted by MN BIANCHI View Post
Galvinized is OK, it will take a long time to rust if ever.
My new house uses it. Make sure it is insulated so it doesn't sweat into your attic.

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Old 01-28-2012, 11:44 PM   #7
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Default Re: Galvanized duct for dryer vent?

Use 4" white 636 Ipex piping for gas furnace venting!
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Old 01-29-2012, 12:02 AM   #8
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Default Re: Galvanized duct for dryer vent?

Absolutely. Here in Nor Cal we use galvanized pipe (duct). No screws to catch lint. Tape only at joints. Runs over 13' in length need boosters.
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Old 01-29-2012, 01:43 AM   #9
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Default Re: Galvanized duct for dryer vent?

Ha! Like OP I live in VA too! My house was built 15 years ago and I have a 12 foot run in the upstairs crawl space. The laundry room is upstairs. Originally the duct was flexible plastic I had the good sense to replace it with the flexible metal. I clean it out about twice a year. I had thought about replacing it with the sheet metal piping they sell for gas water heater venting. The obvious option of venting straight from the back of the dryer would put a hole in my roof on the downward side of a steep slope. I can't imagine what the original designer of this house was thinking. I'm the original owner and although it's a builder home I pored over the plans while it was being built and did catch a few "mistakes." I didn't catch this! What is this "booster" NapaAl speaks of?
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Old 01-29-2012, 01:47 AM   #10
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Default Re: Galvanized duct for dryer vent?

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Absolutely. Here in Nor Cal we use galvanized pipe (duct). No screws to catch lint. Tape only at joints. Runs over 13' in length need boosters.

100% agreed. ^
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Old 01-29-2012, 01:51 AM   #11
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Default Re: Galvanized duct for dryer vent?

I prefer aluminum over galvanized for dryer vents. The galvanized pipe surface roughness seems to catch lint fibers easier than aluminum so clogs build up faster.
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Old 01-29-2012, 03:36 AM   #12
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Default Re: Galvanized duct for dryer vent?

AL flex duct is not a good choice for dryer venting it will catch lint & build up debris inside. Galvy duct is used around here.
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Old 01-29-2012, 06:55 AM   #13
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Default Re: Galvanized duct for dryer vent?

I own a laundromat with dozens of large dryers. All have galvanized ductwork and most of it has been there for over 40 years.

If your crawlspace is cold, you may get some condensation. Just pitch the duct so the water can run out.
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Old 01-29-2012, 08:36 AM   #14
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Default Re: Galvanized duct for dryer vent?

Thanks for all of the responses. Guess I will stick with the galvanized.

I could not find aluminum rigid duct. That is what I wanted to use but Lowes only carried the galvanized rigid, the alumunium flex duct, or the plastic wire reinforced stuff that I had no intention of using for this.

THANKS AGAIN!!
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Old 01-29-2012, 08:40 AM   #15
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Default Re: Galvanized duct for dryer vent?

What do you use as a booster for the longer runs?
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Old 01-29-2012, 01:58 PM   #16
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Default Re: Galvanized duct for dryer vent?

Quote:
Originally Posted by Norcal View Post
AL flex duct is not a good choice for dryer venting it will catch lint & build up debris inside. Galvy duct is used around here.
I don't use Aluminum flex duct, I use smooth Aluminum ductwork. It looks just like the standard galvanized stuff just a lot smoother. Aluminum costs a bit more and is harder to find but well worth the effort and cost. The way steel products are going it might even cost less nowadays...
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Old 01-29-2012, 03:00 PM   #17
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Default Re: Galvanized duct for dryer vent?

Quote:
Originally Posted by FrankieD View Post
Have you considered PVC?
Do not use anything that will burn. That leaves out plastics.
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Old 01-29-2012, 06:20 PM   #18
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Default Re: Galvanized duct for dryer vent?

install a lint trap as well to help keep it clean
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Old 01-29-2012, 06:39 PM   #19
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Default Re: Galvanized duct for dryer vent?

I found rigid aluminum duct in two foot sections. Pieced it all together and sealed it with aluminum tape. Worked like a champ.

Thanks again for the help.
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Old 01-29-2012, 10:17 PM   #20
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Default Re: Galvanized duct for dryer vent?

Cool...



Where did you find it?

Sorry about the disjointed post. I am having a little diabetes problem, hypoglycemic event.
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