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Best way to seal/insulate square ductwork?

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Best way to seal/insulate square ductwork? CraigT 11-25-2007
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Posted by CraigT on November 25, 2007, 4:17 am
My furnace is in a 12' X 20' storage room in my basement. Another room in
the basement that is a little larger is my Home Theater set up and my
computer desk. I have no vents open in my basement, yet the leakage from
the ductwork is enough to heat it in the winter and in the summer makes the
basement like an icebox. I have often thought that the furnace would be more
efficient if I could seal and/or insulate the square and round ductwork in
the basement. I have seen the air bubble foil wrap, but wonder if this would
be a good solution for the square ductwork? Also, how would this best be
accomplished yet still allow for duct cleaning every few years?



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Posted by on November 25, 2007, 4:35 am
On Sun, 25 Nov 2007 04:17:22 -0500, "CraigT"

>My furnace is in a 12' X 20' storage room in my basement. Another room in
>the basement that is a little larger is my Home Theater set up and my
>computer desk. I have no vents open in my basement, yet the leakage from
>the ductwork is enough to heat it in the winter and in the summer makes the
>basement like an icebox. I have often thought that the furnace would be more
>efficient if I could seal and/or insulate the square and round ductwork in
>the basement. I have seen the air bubble foil wrap, but wonder if this would
>be a good solution for the square ductwork? Also, how would this best be
>accomplished yet still allow for duct cleaning every few years?
>

They sell foil covered fiberglass insulation in rolls just for that
use. You DO NOT want to use anything that is not made for this
purpose as a fire could start, at least nearest the furnace. You
apply this stuff with a special aluminum duct tape.

To make for easy cleaning, leave a few gaps where you open the ducts.
Maybe cover them with something easy to remove. A piece of this same
insul. held in place with steel wire would be one way.

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