I'd be tempted to keep them closed. Don't want to let humidity
in.

--

Christopher A. Young
You can't shout down a troll.
You have to starve them.
..

"ken" wrote in message
oups.com...
: Our new central a/c unit does not do much to cool our second
: floor...We live in an old house and the ductwork apparently
can't
: handle the job too well.
:
: We have an exhaust fan in an upstairs window and ceiling fans
in the
: bed rooms.
:
: 1. Is it ok to use these while the a/c is on?
:
: 2. can the upstairs windows be open to be able to get a breeze
at
: night, even thought he a/c is on?
:
: thanks
:
: Ken
: