Hi, folks-Anybody out there know of an effective freestanding air cleaner? I need something portable, as I'm unable to vent to the outside of the unheated basement I'll be building in. I've seen models by Rigid and Delta; the Delta is just too big for my purposes. It's a small basement, with a low ceiling,(which precludes my installing something between the joists). Any informatio;n or ideas welcome.-Greg