Roomaid Snap-On HEPA Cartridge Replacement HEPA filter cartridge in white or black is the 8 inch replacement for the Roomaid air purifier by Amaircare. Lasts for 2 to 5 years. Snap off old filter, snap on new filter. Over time (2-5 years) the HEPA filter cartridge clogs with particulates and significant airflow reductions occur. Perfect Seal HEPA cartridges ensure that air does not pass around the HEPA media.