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Return duct to HVAC collapsed - DIY advice?

Posted on 4/30/19 at 8:56 am
Posted by StringedInstruments
Member since Oct 2013
19829 posts
Posted on 4/30/19 at 8:56 am
The insulation on the duct that returns the air through the filter into my HVAC has rotted and fallen in.

Seems to be an easy fix: measure size of duct, go to Home Depot to purchase replacement, use duct tape to secure and enjoy a/c.

But am I missing anything? Is this as easy as it seems or should I contact a company?
Posted by wickowick
Head of Island
Member since Dec 2006
46135 posts
Posted on 4/30/19 at 8:58 am to
Your supply options will be much greater if you go to a HVAC supply place. The question is, why did it rot? Condensation?
Posted by piratedude
baton rouge
Member since Oct 2009
2690 posts
Posted on 4/30/19 at 9:05 am to
is this metal duct with insulation lining, or is the duct made of rigid insulation that is cut and taped together?
Posted by StringedInstruments
Member since Oct 2013
19829 posts
Posted on 4/30/19 at 9:28 am to
quote:

The question is, why did it rot? Condensation


It’s a rental house with a landlord who doesn’t give one shite about anything. Probably condensation. Not sure. I had to patch a ton of leaks throughout the ductwork. When I brought it up with him he said, “crawl spaces get cold and are drafty and it’s nothing to worry about.”

Posted by StringedInstruments
Member since Oct 2013
19829 posts
Posted on 4/30/19 at 9:29 am to
quote:

is this metal duct with insulation lining, or is the duct made of rigid insulation that is cut and taped together?


It’s like a soft aluminum paper-like material with cushy insulation attached to it. Wish I had more technical terms. The insulation is crumbling and the duct tape that attached it all to the blower has lost its stick.
This post was edited on 4/30/19 at 9:30 am
Posted by wickowick
Head of Island
Member since Dec 2006
46135 posts
Posted on 4/30/19 at 9:39 am to
Yea, find a HVAC supply place in your area, they had the stuff I needed where HomeDepot and Lowes did not. A bonus is that HVAC supply was cheaper than the big box places.
Posted by idlewatcher
Planet Arium
Member since Jan 2012
86732 posts
Posted on 4/30/19 at 10:02 am to
quote:

use duct tape to secure and enjoy a/c.


Might want to look into HVAC sealing mud. Works better in the southern heat. The tape on my unit kept separating during the summer months so I put on the sealing mud (it goes by another name but I don't remember it) and haven't had to do any repairs since and that was 4-5 years ago.
Posted by JamalSanders
On a boat
Member since Jul 2015
12183 posts
Posted on 4/30/19 at 12:22 pm to
I'd move.
Posted by StringedInstruments
Member since Oct 2013
19829 posts
Posted on 4/30/19 at 1:29 pm to
Houses in our area rent for $2000+. We’re renting for $1400. We’re two years away from a good down payment with a nice nest egg. Really don’t want to commute.

I do want to move and have flirted with the idea of buying a house too soon. But for now, it’s fix little things on my own when I have to.
Posted by JamalSanders
On a boat
Member since Jul 2015
12183 posts
Posted on 4/30/19 at 1:50 pm to
That's tough.
Posted by gumbo2176
Member since May 2018
18024 posts
Posted on 4/30/19 at 1:51 pm to
quote:

It’s like a soft aluminum paper-like material with cushy insulation attached to it.


It's called "duct board" and used in place of real metal ductwork with glued on insulation on the interior surface.

Find an A/C supply house and go buy what you need. They make a special tool to cut it by forming a "V" groove so when you fold the material you get a tight corner to form your return air box.

ETA: Go to u-tube and look up "Making a duct board plenum" and you'll get a few videos on how it works.
This post was edited on 4/30/19 at 1:56 pm
Posted by StringedInstruments
Member since Oct 2013
19829 posts
Posted on 4/30/19 at 3:34 pm to
Well in a strange turn of events, the landlord wants to come fix it. Wants to do it himself so we’ll see what comes of it.
Posted by gumbo2176
Member since May 2018
18024 posts
Posted on 4/30/19 at 3:42 pm to
quote:

It’s a rental house with a landlord who doesn’t give one shite about anything. Probably condensation. Not sure. I had to patch a ton of leaks throughout the ductwork. When I brought it up with him he said, “crawl spaces get cold and are drafty and it’s nothing to worry about.”


See, that's the thing with a lot of landlords. Something like this, they aren't paying the utility bill, so they don't usually give a crap.

Good to see he's coming out to see about repairing it, or at least looking at it to see what needs to be done.

It's really not your responsibility to repair that type crap in a property he owns.
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