"if the purifier has a high powered fan, the swirling air could make it feel drier... moving air will dehydrate you faster than stagnent air..." That makes a lot of sense! Thanks for your input.
The purifier we have is said to only do about 250 square feet or something but the salesman said it would cover up to 1000 but would just take a few hours longer to replenish the air over and over in such a large space. We have the amaircare 3050 or something rather. I have found it doesn't work well in a large room, but in a bedroom it works great. In a livingroom it works decently. If kept on high continuously, it seemed to affect about 500 square feet or so.
Thanks again for responding to my post. -manyembers