Febreze Eureka Exhaust HF-7 HEPA Filter, Fits Eureka Part 61850. Fits Eureka Parts 61850, 61850A, 61850B-2, 61850C-2, 61850D-4, 61850F-4 Fits Eureka Power Plus, Athena Models 2971AV, 2971BVZ, 2981A, 2981BVZ, Works With Eureka DCF-9 Washable Foam Filter on 2900 Series Models Freshen Your Home Removing All Traces of Bad Odors, Including Pet Odors Eureka Recommends Replacing The Filter Every 6-12 Months