The ‘FILTER VENTILATOR AIR INLET M2M FREVEL 1Each – 19826-001’ is a crucial component for your ventilator system. Designed specifically for the REVEL model, this air inlet filter ensures clean, uncontaminated air is circulated through the machine. This product is sold individually, allowing you to purchase the exact quantity you need. Please note, it’s important to replace your ventilator filters regularly to maintain optimal performance and hygiene.