The Inogen One G3 Particle Filter comes with two filters.
An eco-friendly replacement, G3 Particle Filters keep dust, pet hair, and other air-borne contaminants away from your oxygen. Compatible with any Inogen One G3 Systems with a flow setting range between 1-5, these first-rate filters are removable and cover the air-intake screens. Washable and reusable, users should wash and dry the filters weekly or more often in extremely dusty environments to keep the concentrator working properly well into the future. Particle filters should be replaced once its become misshapen or when the screen is damaged.
Inogen One G3 System User Manual
Inogen One G3 System Multi-Lingual User Manual
Inogen One G3 System Technical Manual
Inogen One G3 System Getting Started Guide