Filtco announces online ordering of replacement filters making it easier to maintain hoods (and health), with affordable FILTCO brand replacement filters. Filtco sells models used in hoods made by Air Science, Astec, Captair Equipment (Bigneat and Crumair ), Misonix Equipment (Labcaire), ESCO, and Semper. The online store is located at www.filtcofilters.com. Filtco will honor the remaining balance of any factory warranty that may be left on a hood. For older units, it will extend the expired warranty on any parts that are affected by use of their filter for an additional 12 months.