so, i turned the fan off when he got home this evening, to give him, or his guests, a chance to not smoke.

and, as of about 23:30, i can smell him, or somebody around here, smoking and have turned it back on.

i will acknowledge that it may partly be a consequence of the air conditioning. but, i've never seen anybody outside smoking.

all i know is that it was fine in here until he got home, and now i can smell it, since he's come in. whether he's smoking inside with the windows shut, or doing something else that lets bad air in is secondary to me. my concern is in mitigating the problem.