On Tue, 2 Aug 2016 15:11:21 -0000 (UTC), John McCoy
wrote:

wrote in
:

About 3/4ths of my basement is finished into a family room, the
remaining 1/4 has been walled off for my wood shop, this gives me
the comfort of air conditioning and heating. My problem is the
odors and fumes created when refinishing my wood projects are going
through out the house. Can I install some kind of exhaust fan to
vent those odors and fume to the outside without affecting my
heating and air conditioning,

As Sonny suggested, you have to consider where the air is
coming from to replace what you are venting to the outside.
If it's coming from the air conditioned/heated part of the
house, then yes, it will affect your heating and AC.

Not to mention moisture content. Bringing warm, moist, air into a
basement isn't a good idea.

would a bathroom type venting fan work
or would a larger system be required?

Depending on what your fumes are and their intensity, you
might need a fan rated for flammable vapors.

It would be _really_ unusual to have an air mixture above the
flammability (or explosive) limit. If the concentration in the room
were that high, the room would blow anyway. IMO, this is sorta like
the "ground your DC so you don't have a dust explosion" sort of thing.

Ideally you'd have two fans, or a two speed fan - so you
can have a higher flow rate while you're actually doing
the finishing work, and a lower one while the project is
drying (e.g. overnight).

John