Zaf wrote:

(Chet Hayes) wrote in message . com...


willshak wrote in message ...


David wrote:



I have posted this question in the past, but never received a
satisfactory answer. Perhaps this time someone smarter than I can
come up with a good solution...

Question: How to stop AC ducts in the attic from accumulating water
during the winter



Good question, I struggle with this also. One option I have actually
done. Leave the registers open and heat the whole AC ductwork. Kinda
Pricey because the insulation is not that thick, not to mention the
vapor barrier is on the wrong side.







Other than taping saran wrap over the grills, how easy would it be to
slip something behind the grills?
If they are plastic and held in place with 4 screws like mine, remove
one or more screws and loosen the others just enough so you can slip
something inside to block the vent, like a piece of cardboard, or other
thin material, cut to the shape of the vent grill.



A decent amount of work, also the way my registeres are anchored, this
is a two person job. 'There must be an easier way'(?).


Then how about constructing some sort of cover made from a thin sturdy
material and use clips (I'm thinking plastic automobile type panel push
clips) that would push into the slots in the vent. With the right size
clips, it would be an easy snap-on snap-off arrangement. ( I wonder if
someone doesn't make these already?).
Google on - ac vent covers -, you'll find some other ideas like,
http://www.energyfederation.org/gwne...ath/86_742_111



My solution: Not perfect. Every fall, I enter the attic and


disconnect the flexible ducts from the ceiling registers. I cover the
ceiling registers with lots of insulation. In the late spring, I go
into the attic and reverse this process by reconnecting the flexible
ducts to the ceiling registers. This process is a royal pain. I
would like a more permanent solution.



I admire your dedication, but this is a lot of work!




There are magnetic register covers that can be applied to the
registers in the ceiling that should do the trick.




Ahhh, I had a sheet magnet and tried this on one register, only to
find it was not magnetic!