Air Fantastic AF4000 Stand-Alone Filter-less Whole Home Air Purifier with WashYourAir Ion Technology (up to3.000 sq ft). AF4000 whole home air purifier does the job of around 9 HEPA air filters that cost about $1800 Includes: AF4000 unit, AC/DC transformer (100~240 VAC), & manual. One compact unit (15.5" tall) purifies up to 3,000 sq. ft. (non-smoking, no pet area). Got Allergies? WashYourAir reduces pollen, particulates, & airborne mold by up to 99%! Chemical deodorizers only mask odors. WashYourAir ions actually break down the odor on a molecular level to eliminate it.