Products featuring a HEPA filter are often not easy to replace and can cause a lot of stress for such simple maintenance work. Handy Dryers has designed their product in such a way that allows for easy and straight forward replacements of components in the event of failure. Simple slide out the old Gorillo Ultra HEPA filter and slide in the new one. This helps to prevent the filter itself from becoming contaminated and over run with bacteria. The filter should be replaced every 6 months.