Secondary Air Filters

The inner or secondary filter acts as an optionally available filtration during servicing of the primary filter. It generally fits inside the outer element. It can also protect the air from airborne particles if the main filter is damaged or replaced. In short, even if they are secondary, they are responsible for maintaining the quality of the air circulating you.

We recommend that the inner air elements need to be changed every third the time when the primary (outer) element is changed. These filters can function normally in an area of repeated turbulent airflow, repeated fan shutdown, desert, as well as the purpose of marine installation. Other types of pocket filters are used both in commercial and industrial applications.