The Honeywell True HEPA tower air purifier captures 99.97 % of harmful particles, including allergens and germs and is provided with electronic touch controls which allow to select a "turbo" option. Filter indicator tells you when to clean it. It is equipped with a replacement filter "H" HRF-H1C or HRF-H2C (to change every year) and a pre-filter "B" HRF-B2C (to change every three months). Its effective coverage is up to 170 sq.ft. This black of color air purifier measures 28" x 13 1/4" x 10 7/8". It is Energy Star rated and is protected by a 5 year limited warranty.