It is recommended that you should change your air filters every 3 months. This is so you can continuously have fresh air filters to pull harmful particulates out of the air. However, depending on the circumstances, you may need to change the filters sooner. If you have pets or allergies, you may need to change the filter between 20-60 days of replacing.
A panel air filter is a filter that is used to protect the interior components of an HVAC or extend the life of secondary filters in all applications. Panel filters also remove dust and particles from the air and clean them using a negative pressure system.