"Nobody" wrote in message
46.128...
CptDondo wrote in
:

Patrick Maloney wrote:
I've never had a forced air system. I'm looking at an apartment
which has forced-air heat and a/c. Do these systems pull in fresh
air from the outside or just recirc air in the apartment? I ask
because the windows in this unit aren't going to make it simple to
stick a fan in and do my own airing out of the apartment.

There's usually a fresh air inlet as part of the forced air system,
but most of the air is recirculated.

Does the fresh air aspect apply to both heat and a/c?


AC doesn't use air for combustion--no need to get outside air. 80%
efficient furnaces use inside air for combustion--it (combustion air) gets
replaced by sucking air into the house anyway possible--through windows,
cracks, outlets etc. 90+% furrnaces use outside air for combustion. All
air is recirculated, eliminate drafts.
MLD