Removing filters for the AirDoctor AD3000 is simple:

1. Unplug the device
2. Remove the front cover
3. Take out the pre-filter and the activated carbon filter
4. Remove the UltraHEPA filter

To reset the filter replacement indicator, you just need to press the Auto and Dim buttons together for three seconds.

Go to https://housefresh.com/ to read our full review of the AirDoctor AD3000.