I don't quite know what a "whole house fan" is - is that air conditioning? I guess it might help depending on the size of the house, the size of the bedroom, and whether the air comes from outside. I feel like it's to do with gas conditions - too much CO2, too little oxygen, carbon monoxide buildup, some kind of material outgassing - who knows.
Winter is trickier, but as I live in a relatively mild climate I usually deal by keeping the bedroom door shut, the room heating off, and snuggling under a thick duvet with pyjamas. You sleep better in cooler conditions anyway. If it's really cold out, I'll air the whole house while I'm not at home and the heating's off anyway - then I sleep with the bedroom door open, in the hope that I at least get the benefit of the larger volume.
In Europe, as you say, a very large number of people smoke, even though they're just as aware of the health problems as Americans. I think America's advantage there is less to do with health consciousness and more to do with a kind of low-key puritanism - smoking is stigmatized and is seen as a moral failing in a way that it isn't in Europe.
Winter is trickier, but as I live in a relatively mild climate I usually deal by keeping the bedroom door shut, the room heating off, and snuggling under a thick duvet with pyjamas. You sleep better in cooler conditions anyway. If it's really cold out, I'll air the whole house while I'm not at home and the heating's off anyway - then I sleep with the bedroom door open, in the hope that I at least get the benefit of the larger volume.
In Europe, as you say, a very large number of people smoke, even though they're just as aware of the health problems as Americans. I think America's advantage there is less to do with health consciousness and more to do with a kind of low-key puritanism - smoking is stigmatized and is seen as a moral failing in a way that it isn't in Europe.