5-Pack Replacement Vornado 221 Humidifier Filter - matching Vornado MD1-0002, MD1-0001 Air Filter

Essential for Allergy Sufferers.. Replacement Vornado 221 Humidifier Filter - Quantity, 5 Replaces Vornado MD1-0002, MD1-0001 Air Filter Traps aqua Impurities & Dissolved Solids Before They Become Airborne For best results, change air filter at least once per season or more often depending on air high-grade and use