This Riccar Radiance Hepa filter set is designed to work in any of the RAD models excluding the RADP1, RADP4, RADP2. The filter set comes with the Hepa filter and the charcoal filter. It is recommended you should change your hepa filter and charcoal filter after using 12 vacuum bags or every year. For households with severe allergy sufferers it is recommended to change the hepa and charcoal filter every 6 vacuum bags or every 6 months.