:> One factor I want to be careful about is that (a) the shop is inside the
:> house, and (b) there is one air return in the shop, directly above the
:> door, which is in the SE corner.
: Did you say the shop is in the house and the room is included in the
: house air system? This seem very problematic. One would think you
: would want to isolate you home air system from the shop air. If not, I
: would think about adding some additional filtering on the return from
: the shop or you are adding fine particulate matter to your whole
: house, lungs, kids, lungs, etc.
It's actually in a guesthouse, not the main house. I have considered
adding a single room air conditioner to the shop and closing off the vent
to isolate the shop from the rest of the guesthouse.
-- Andy Barss