Frequently products featuring a HEPA filter are not simple to replace and can cause a lot of stress for such a simple thing. Handy Dryers has designed their products in such a way that allows for straight forward and easy replacements of components in the event of failure. Simple slide out the old Gorillo Ultra HEPA filter and slide in the new one quick and easy! This helps to prevent the filter itself from becoming contaminated and over run with bacteria. It is recommended that the filter be replaced every 6 months to maintain good hygiene levels.