Filtrete 3M Ultra Quiet Air Purifier FAP01-RS Ultra-quiet portable air purifier for rooms up to 110 square feet 3 fan speeds; CADR of 97 for pollen, 86 for dust, and 72 for smoke Filtrete filter captures 99.9 percent of airborne allergens as small as 0.1 microns Filter-change indicator; 1 filter included; replace filter about every 3 months Measures approximately 7-1/4 by 14 by 18 inches; 1-year limited warranty