This is the Inlet Filter for the Inogen At Home Stationary Concentrator.  This is a filter designed protect your concentrator from airborne contaminants.  The filter is located at the back of the concentrator, near the handle.  It can be removed by sliding it up off of the concentrator.  The Inogen At Home Stationary Concentrator will display a priority error stating "Service Needed" indicating when the filter needs to be replaced. 


* The filter is tightly seated onto the concentrator.  It may require a tool of removal and insertion of new filter.