Running Fiberglass Duct Board?

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Cap
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Post Sun. Aug. 09, 2009 2:39 pm

Does anyone know the ins/outs of running duct board such as 475 FRK duct board It measures out 1" x 48" and sold in straight flat sheets.
qzduct_datasheet.pdf
This is the material which is used. It comes in flat sheets.
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Cap
Lehigh Twp.
Northampton Co., PA

CapeCoaler
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Post Sun. Aug. 09, 2009 3:07 pm

Never have done it but this might give some better hints
http://www.jm.com/insulation/technical_info/ahs20 ... rducts.pdf
Last edited by CapeCoaler on Sat. Apr. 01, 2017 12:01 am, edited 2 times in total.
Reason: <removed dead links>
I am not an engineer, train or otherwise!
I stay at a Holiday Inn at least once a year!
Most of all I do have common sense and a practical application of logic.
Oh, add humor, on the dry side, along with a wee bit 'o sarcasm.

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Cap
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Posts: 1581
Joined: Fri. Dec. 02, 2005 10:36 pm
Hand Fed Coal Stove: Harman SF 250, domestic hot water loop, heat accumulator
Coal Size/Type: Nut and Stove
Other Heating: Heat Pumps
Location: Lehigh Twp, PA
Contact:

Post Sun. Aug. 09, 2009 3:51 pm

Wow, seems like a lot to learn for 25' of duct. This may be one of the few times I pay a HVAC contractor if I decide to go this route,
Thanks
Cap
Lehigh Twp.
Northampton Co., PA


CapeCoaler
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Posts: 4429
Joined: Sun. Feb. 10, 2008 3:48 pm
Stoker Coal Boiler: want AA130
Hand Fed Coal Stove: DS Machine BS#4, Harman MKII, Hitzer 503,...
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Post Sun. Aug. 09, 2009 4:07 pm

The 104 page naima book 2-9 to 2-14.
need some tools.
I agree sometimes it is better to have someone else do it...
so you can do what you do best...
to make the cash or trade for the work you need done.
I am not an engineer, train or otherwise!
I stay at a Holiday Inn at least once a year!
Most of all I do have common sense and a practical application of logic.
Oh, add humor, on the dry side, along with a wee bit 'o sarcasm.

gwjwbw
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Post Sun. Aug. 09, 2009 4:48 pm

I work with duct board for my job, there are different thickness. The way the inside are made, they lose their strenght after a couple of years and you have fiberglass in the air that you breath. I wont put this junk in my own home and wish I could tell customer about it but I may lose my job with my big mouth. If I were you, I use metal duct, unless the duct in a non-condition space such as attic, then you want to wrap the metal duct with duct wrap. Keep in mind, it the air your family breath and they don't tell you that at all.
That my 2 cents!
Thank, Gerard

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Cap
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Posts: 1581
Joined: Fri. Dec. 02, 2005 10:36 pm
Hand Fed Coal Stove: Harman SF 250, domestic hot water loop, heat accumulator
Coal Size/Type: Nut and Stove
Other Heating: Heat Pumps
Location: Lehigh Twp, PA
Contact:

Post Sun. Aug. 09, 2009 5:30 pm

gwjwbw wrote:I work with duct board for my job, there are different thickness. The way the inside are made, they lose their strenght after a couple of years and you have fiberglass in the air that you breath. I wont put this junk in my own home and wish I could tell customer about it but I may lose my job with my big mouth. If I were you, I use metal duct, unless the duct in a non-condition space such as attic, then you want to wrap the metal duct with duct wrap. Keep in mind, it the air your family breath and they don't tell you that at all.
That my 2 cents!
Thank, Gerard
Too late, my house is already full of it. I am only thinking about adding a stoker furnace into the mix.
Cap
Lehigh Twp.
Northampton Co., PA


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Yanche
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Post Sun. Aug. 09, 2009 5:40 pm

Don't use fiberglass duct board. Most installations are not installed per the manufactures procedures and have issues with fiberglass dust in the air. Stay clear, use metal. Find a local HVAC shop to do the job or find a specialty custom duct shop that accepts AutoCAD dwg files. Then you can design away with free AutoCAD like drafting software and get exactly what you want.
Yanche
Alternate Heating Systems S-130
Stoker Boiler burning Anthracite Pea Coal

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steamup
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Post Fri. Aug. 21, 2009 8:33 am

I agree with Yanche. I have been in the HVAC business for 30 years. Fiberglass ductboard is the cheap alternative that contractors use to make their prices more competetive. It generally doesn't hold up as well as metal wrapped with fiberglass. It takes special knives to cut the grooves in the board to form the duct. You need to wear a mask to protect your lungs. You need to keep the foil surface of duct perfectly clean or clean it before using the pressure sensitive tape on the joints, otherwise the tape peals off after time. You need to use trapese hangers to hang the stuff as it has no structural integrity.

I have seen jobs 20 years old that are fine and I have seen jobs that are 3 years old falling apart.

For one small job, by the time you buy the tools and learn how to cut the stuff, you might as well use the money for the metal duct.
Steamup

"You must learn from the mistakes of others. You can't possibly live long enough to make them all yourself."
Sam Levenson
"Make everything as simple as possible, but not simpler."
Albert Einstein

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