It is important that you change your filters regularly, as it is the best way to maintain an optimal level of air quality.
Many of our Purifiers have a Filter Life Indicator, located just above the 'Filter' button that reflects when it’s time to change your filter. The system involves three lights: Green (sufficient life remaining), Yellow (almost time to replace), and Red (needs to be replaced).
If you own one of our earlier models that doesn’t have a light system, you might notice that the air purifier is working harder than usual, indicating that it is time to replace the filter. For normal 24/7 use, expect to change your filter every six months on these units.
Example Filter Replacement Video: Replace an Alen 75i Filter/Reset Filter Light Indicator
Please review the relevant articles for changing the Filter and resetting the Filter Light Indicator below: