Replacement 30930 Filter for Hunter Air Purifier Filter - Compatible with Hunter 30930, Hunter 30375, Hunter 30200, Hunter 30374, Hunter 30201, Hunter 30250, Hunter 30350, Hunter 30377, Hunter 30205 Replacement 30930 Hunter Filter - Compatible with Hunter 30930, Hunter 30375, Hunter 30200, Hunter 30374, Hunter 30201, Hunter 30250, Hunter 30350, Hunter 30377, Hunter 30205, Hunter 30253, Hunter 30255, Hunter 30256, Hunter 30380, Hunter 30390, Hunter 37255, Hunter 37375, Hunter HR30374 Replaces Hunter 30930 Air Filter 3 Filtration Layers for the best air purification: 1st layer removes large particles from the air, 2nd layer removes particles as small as .1 microns, 3rd layer removes odors such as tobacco smoke, cooking and musty air 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!