UpStart Battery 4-Pack Replacement Sunbeam SCM2400 Humidifier Filter - Compatible Sunbeam SWF100P, HWF100 Humidifier Filter Replacement Sunbeam SCM2400 Humidifier Filter; Quantity, 4 Replaces Sunbeam SWF100P, HWF100 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!