Yes.

Side note, drywalling a cellar ceiling makes every future repair project
much harder. Drop ceilings with ceiling panels are much easier for service
guys. If you drywall the ceiling, you may well regret it later.

--

Christopher A. Young
Do good work.
It's longer in the short run
but shorter in the long run.
..
..


"Christian Fox" wrote in message
...

So, I'll simplify the question: Can a high-efficiency natural gas furnace
use the same
ductwork as a 15-year old, standard-efficiency furnace?