Ions purify patient's air

A New York psychiatric center sought means to both rid a geriatrics' lounge of unpleasant orders and clear an out-patient program's hall of tobacco smoke. Many devices were tried, including scented mop water and ceiling vents. Small "air cleaners" were found to be ineffective; electrostatic air cleaners would be both expensive and troublesome. Ceiling mounted ion generators have done the job, are cost effective, simple, and unobtrusive. No behavioral side effects have been noticed. The Center is now experimenting with a device which negatively charges a whole room.