Hepa Air Filter Fits Enviracaire 110 Series 10700 10715 19700 Manufactured By RPS E197 E 197 E-197 E197-1 E 197-1 E 197-1(RPS)Honeywell Enviracaire Air Purifiers: 10200 (85L), 10700 (110L), 10715 (110LX) True HEPA filter 99.97% effective at removing particles as small as 0.3 microns from the air that passes through the filter Replace every 1-3 years depending on use and environmental conditions.