Logically it would make your air cleaner because it would force the air to
go thru your return filter but I don't believe it would affect air flow.


"Postal68" wrote in message
. ..
I was getting poor airflow to my 2 bedrooms on my top floor.
The heating/cooling blower is 2 stories down in the basement.
I sealed up every horizontal duct seam I could get to in my basement and
it really did help the airflow upstairs. I found I was losing alot of air
in the basement ducts before it even got moving along the way to all the
registers in the house.


Anyway,
should I seal all the returns as well?
Would this make my airflow even better?