2-Pack Replacement MD1-0002 filter for Vornado, Holmes - Compatible with Vornado Evap3, Vornado Evap2, Vornado MD1-0002, Vornado MD1-0001, Holmes HM725, Vornado 432, Vornado HU1-0021, Vornado Evap1, Vornado Model 30, Vornado Model 40, Holmes HM250, Holmes HM405, Holmes HM406 Replacement MD1-0002 filter for Vornado, Holmes - Compatible with Vornado Evap3, Vornado Evap2, Vornado MD1-0002, Vornado MD1-0001, Holmes HM725, Vornado 432, Vornado HU1-0021, Vornado Evap1, Vornado Model 30, Vornado Model 40, Holmes HM250, Holmes HM405, Holmes HM406, Holmes HM1000, Holmes HM1025, Holmes HM1050, Holmes HM2000, Holmes HM1550, Holmes HM1555, Holmes HM650, Holmes HM726, Holmes HM730, Vornado 221, Vornado 232, Vornado 421, Vornado 3120-900, Vornado HU1-0006-11, Vornado HU1-0007-11 Replaces Vornado MD1-0002 Humidifier Filter Traps Water Impurities & Dissolved Solids Before They Become Airborne For best results, change air filter at least once per season or more often depending on air quality and use. Essential for Allergy Sufferers. On Sale for a Limited Time!