Air purifiers have a fundamental flaw. They rely on air being pulled through the unit in order to clean it. This creates an ineffective, high energy cost air purifier. Our air purifiers utilize a new generation of technology. This technology does not reply on filters or air passing through the air purifier. This new technology simply produces a blanket of redundant oxidizers that not only clean your air, but sanitize surfaces as well. Features & Benefits of the AO3000 * Ultra Quiet * Reduce Mold * Reduce Bacteria * Reduce Viruses * Reduce Odors * Reduce VOCs * Reduce Allergens * Made in USA * 30 Day Money Back Guarantee * 3 Year Warranty * Zero Maintenance * Areas of higher contamination or closed floor plans may require multiple units to cover suggested sq. ft Home Air Purifier Coverage: Up to 3000 sq. ft.* Dimensions: 4" x 4" x 14.5" Electrical: 115VAC 40 Watts Replacement Cell: AHPCO-5 The New Generation of Air Purification. PCO technology