Steve Barker wrote:
willshak wrote:
Just a hint.
In the winter, my air conditioning ducts, with the AC handler in the
uninsulated attic, let in a lot of cold air. Although there are
movable vanes inside the vents that can be shut, usually with a
screwdriver, they are not airtight. So how do I stop the air
infiltration? They sell magnetic covers for the metal vents, but what
about plastic vent plates which I have? I used to cover my plastic
vent plates with pieces of plastic wrap that I taped on. It was time
consuming trying to hold the thin floppy plastic film and tape it on
at the same time. In the last couple of years though, I use the
Contact Paper type of self sticking plastic shelf covering. Just cut
it to size, peel the paper off to reveal the adhesive, and stick the
plastic to the vent plate. I use the white kind so it hides the vent
vanes, leaving the whole plate white, but that's only a matter of
aesthetics, the clear kind, or any of the various colors and patterned
types, work as well.
Don't forget the AC return vents too.



i don't understand how the air is getting IN to the ducts to come out cold.

Th AC is probably separate from the heating system and the whole
thing sitting in the cold attic is like it was sitting in a fridge.
All of it is cooled down and the cold air being denser than the
warm air inside the house would make it spill out of the ductwork.
If you open your refrigerator and hold your hand close to the floor
in front of the open door, you will feel the cold air spilling out
of your fridge. It's the same principle.

TDD