This Honeywell HPA100 HEPA Air Purifier includes a Certified Honeywell HEPA Filter that helps capture up to 99.97% of the following microscopic airborne particles: pollen, pet dander, debris and smoke.* Recommended for medium 155 sq. ft rooms. This Honeywell air purifier can filter & circulate air up to 4.8 times an hour. If you have pets or stale indoor air, air purifiers help deliver cleaner, fresher air. This Honeywell HEPA Air Purifier is part of our Allergen Plus series. This product earned the ENERGY STAR label by meeting strict energy efficient guidelines set by the U.S. EPA. Always purchase Genuine Honeywell replacement air purifier filters. They are certified to help capture unpleasant smells and the following microscopic airborne particles*: pollen, pet dander, debris and smoke. Other compatible filter replacements are not guaranteed to offer the same performance or efficiency. Quiet air purifier has a filter change indicator, 2, 4 or 8 hour automatic shut-off timer and a control panel dimmer. Backed with a 5-year warranty. Disclaimers: *From the air that passes through the filter, 0.3 microns and larger. **Based on 3rd party independent CADR testing for the smoke CADR value when operated at the highest level. Air circulation depends on many factors, such as room size and configuration. There is no guarantee that all of the air in a room will pass through the filter. The ENERGY STAR name and mark are registered trademarks owned by the U.S. EPA. The third-party testing for the R filter efficacy was done by LMS Technologies, Inc. on July 28, 2022.