Air-Guard Breathing Filters

Air-Guard breathing filters protect respiratory systems and oxygen concentrators from bacterial and viral contamination without compromising airflow. For respiratory therapists, home oxygen users, and equipment managers, the concern is always the same: keeping the breathing circuit clean while maintaining the flow patients depend on. These filters answer both, capturing 99.9% of airborne bacteria and viruses while adding almost nothing to the work of breathing.

The Air-Guard Breathing Filter is engineered for exactly this balance. At just 0.7 cm H2O resistance to flow at 30 L/min (and 1.7 cm H2O at 60 L/min), it stays out of the way of natural respiration, so patients don't feel like they're fighting the circuit. Its low 120 mL compressible volume helps preserve delivered tidal volume, and the 56-gram weight keeps the filter light enough to sit inline without stressing tubing connections. The clear housing lets clinicians and caregivers visually check for moisture buildup or occlusion at a glance.

Buyers typically ask where in the circuit these belong and how long they last. Air-Guard filters are placed inline between the patient connection and the concentrator or respiratory device, serving as a protective barrier that guards both the equipment and the person from cross-contamination. Because they're single-patient, disposable components, they're replaced according to your facility protocol or device manufacturer guidance—an inexpensive step that extends the life of costlier equipment.

If you're outfitting or maintaining respiratory equipment, you may also want to review related airflow and breathing support products such as Air-Eze, Air-Lon, and Air Source Indus to complete your respiratory care inventory.