The MCI™ BREEZE air purification unit delivers powerful MCI™ technology for your indoor environment. The patented DBI (di-electirc barrier ionizer) cell provides powerful protection against mold, bacteria, and viruses as well as VOCs common to indoor environments. The fan is 9 inches and features a quiet 3-speed operation. The MCI™ BREEZE will purify an area up to 900 sq. ft. to 1200 sq. ft.