Filter Stream FS-710 is 99.0% efficient at capturing particles such as pollen, mold spores and dust mite debris. Certified to clean 400 sq. ft. in 20 minutes. Includes 2 filers. Can be replaced with any brand 16x20 filter. Includes aroma cartridges: orange, grapefruit and lavender. Whisper quiet operation, automatic on/off timer. r# n#1 Year Manufacturers Warranty r# n# r# n#FS-710