The ‘FILTER VENTILATOR AMBIENT AIR REAR INLET HIGH DENSITY FOAM 1Each – 20819’ is a high-quality ventilator filter designed for optimal performance. This product is designed to filter ambient air entering through the rear inlet of a ventilator system. It is made from high-density foam, ensuring effective filtration and long-lasting durability. This filter is sold individually, making it a cost-effective choice for maintaining your ventilator system. Its robust construction ensures it can withstand the demands of continuous use, making it a reliable choice for healthcare facilities.