Bob D. wrote:
A friend of mine just moved into a small older house. It has a small forced
air gas furnace (Carrier brand), that I'm sure was retrofitted at some
point. For the life of me, I can't find a furnace filter. Did they not use
air filters in the old days? I just want to make sure this isn't a critical
component.


They don't necessarily come with the furnace. I didn't have a filter in
my house either when I moved in. Had a Honeywell electrostatic added
when the A/C was installed (SWMBO is a clean freak, insisted on either
that or HEPA.)

nate

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