Flexible AL Foil Duct For Bath Vent

 
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Old 06-09-2017, 07:25 PM   #1
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Flexible AL Foil Duct For Bath Vent


We have about a 25' run in a basement bath, through ceiling joists, which takes (2) 90 degree bends along the way.

My experience is that venting for moisture, wherever there is drywall, should be sheet metal. I've replaced this foil coil in short runs (through accessible attics) that develop pinholes and slits in it, after a short number of years.

Not only is sheet metal sturdier, it is better shaped for internal moisture (no "continuous wire" catches).

Anyone using this for reasons beside cost and ease of install?
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Old 06-09-2017, 07:57 PM   #2
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Re: Flexible AL Foil Duct For Bath Vent


Don't much care for the aluminum stuff; too delicate and generally a PITA to work with.

I prefer insulated plastic esophagus. Tough, flexible and a heck of a lot easier than rigid sheet metal. Plus, you really ought to have that insulation.

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Old 06-09-2017, 07:59 PM   #3
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Re: Flexible AL Foil Duct For Bath Vent


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Don't much care for the aluminum stuff; too delicate and generally a PITA to work with.

I prefer insulated plastic esophagus. Tough, flexible and a heck of a lot easier than rigid sheet metal. Plus, you really ought to have that insulation.
Where do you get this from?
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Old 06-09-2017, 08:09 PM   #4
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Re: Flexible AL Foil Duct For Bath Vent


the 4" x 25' insulated flex stuff will restrict air flow too much at that full length. How come you don't have a closer wall?
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Old 06-09-2017, 08:16 PM   #5
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Re: Flexible AL Foil Duct For Bath Vent


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the 4" x 25' insulated flex stuff will restrict air flow too much at that full length. How come you don't have a closer wall?
Room sits on the other side of a garage/poured slab entry.
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Old 06-09-2017, 08:39 PM   #6
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Re: Flexible AL Foil Duct For Bath Vent


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Where do you get this from?
The box stores carry them in 25' lengths.

As for Mark's note about restrictions, I haven't found that to be a problem. I doubt rectangular metal ducting would fare any better, with sharp 90 turns. In either case, an inline booster would take care of that.
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Old 06-10-2017, 06:50 AM   #7
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Re: Flexible AL Foil Duct For Bath Vent


Yeah I'd be careful with that.
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Old 06-10-2017, 07:03 AM   #8
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Re: Flexible AL Foil Duct For Bath Vent


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The box stores carry them in 25' lengths.

As for Mark's note about restrictions, I haven't found that to be a problem. I doubt rectangular metal ducting would fare any better, with sharp 90 turns. In either case, an inline booster would take care of that.
Are you talking about Thermaflex ? http://www.homedepot.com/p/Thermafle...B&gclsrc=aw.ds
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Old 06-10-2017, 08:30 AM   #9
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Re: Flexible AL Foil Duct For Bath Vent


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Are you talking about Thermaflex ?
Yep, that would be one brand.
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Old 06-10-2017, 08:51 AM   #10
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Re: Flexible AL Foil Duct For Bath Vent


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Are you talking about Thermaflex ? http://www.homedepot.com/p/Thermaflex-KP
-- viglink huh? Weird way to try to score some affiliate cash... either way though, California has had some weird things happening getting enough of the thermaflex for some reason over the past couple weeks. Not sure what's up, something wrong with the suppliers?
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Old 06-13-2017, 10:22 AM   #11
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Re: Flexible AL Foil Duct For Bath Vent


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-- viglink huh? Weird way to try to score some affiliate cash... either way though...
You're implying that I'm getting a kickback for the link?

Now you show me exactly how that is happening.

Maybe you should actually know what you're talking about before you post.
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Old 06-13-2017, 05:54 PM   #12
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Re: Flexible AL Foil Duct For Bath Vent


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You're implying that I'm getting a kickback for the link?
I don't think so. Anyone who understands Viglink knows it's installed by the forum owners to squeak out a bit more ad revenue. He was just commenting on the fact it's installed here.
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Old 06-13-2017, 10:25 PM   #13
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Re: Flexible AL Foil Duct For Bath Vent


Definitely want a booster with a 25' run and 2 90's...................
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Old 06-24-2017, 12:05 PM   #14
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Re: Flexible AL Foil Duct For Bath Vent


Only being a bath fan, I don't think the length is much of a factor if the flexible duct is stretched out properly and ran with as few bends as possible. Of course, one would like to keep the run shorter. We only use the insulated flex duct for bath fans. If done right, there has never been an issue. The aluminum flex is garbage, imo.
I would never use it for a dryer vent or range hood vent but bath fans are usually pretty light, CFM wise. In any of our new construction, we are recommending HRV's be installed as well so there is some dehumidification and constant air exchange without too much energy loss. Air exchange has become a big code issue up here in BC. The inspectors are all over it.
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Old 07-25-2017, 01:15 PM   #15
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Re: Flexible AL Foil Duct For Bath Vent


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Originally Posted by ChatsworthCA123 View Post
Yeah I'd be careful with that.

Quote:
Originally Posted by ChatsworthCA123 View Post
-- viglink huh? Weird way to try to score some affiliate cash... either way though, California has had some weird things happening getting enough of the thermaflex for some reason over the past couple weeks. Not sure what's up, something wrong with the suppliers?
Who is this clown
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Old 07-28-2017, 01:31 PM   #16
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Re: Flexible AL Foil Duct For Bath Vent


Quote:
Originally Posted by Tinstaafl View Post
I prefer insulated plastic esophagus. Tough, flexible and a heck of a lot easier than rigid sheet metal. Plus, you really ought to have that insulation.
Totally agree with this! Was my first thought when read the post

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