* #1 Choice of Physicians - * Riter Research Inc. Portable Room Air Cleaners Physicians Preference Study" 1998
* 99.97% True HEPA Permanent filter
* 6 air changes per hour Clean air delivery rate (CADR) for tobacco smoke
* Basic Universal Carbon Pre-filter
HRF-AP1 * True HEPA filter #HRF-11 Easy filter access
* Electronic controls with three speeds and indicator lights