Honeywell HFD-110 QuietClean Tower Air Purifier Operates Room Size: The QuietClean tower air purifier offers superior air cleaning power with permanent filtration. The high efficiency permanent filter removes up to 99% of airborne particles such as dust, pollen, smoke, and pet dander, returning cleaner, fresher air to your room. Compared to ionic air purifiers, the filter from the HFD-110 captures 12 times more pollutants. A powerful but quiet fan pulls air into the unit, circulating and filtering the air in your room several times each hour. The FID filter helps capture airborne particles that are 2 microns or larger in size from the air that passes through the filter. Based on comparison of AHAM CADR results to Ionic Pro model CL-369. Based on AHAM CADR ratings in recommended room size. The permanent filter is easily rinsed clean with water. Easy-to-use touch button electronic controls allow you to choose from 3...