The Respiray H12 Replacement HEPA Filter for Wear A+ is a replacement filter pack that contains (2) two HEPA H12 (MERV-17 equivalent) filters and (1) one hand-washable pre-filter.
Also included is a hand-washable and reusable pre-filter that's made from reticulated foam. This pre-filter works to prolong the life of the main filter. As a bonus, it's easy to know when to replace the HEPA filter thanks to the purifier's blue LED indicator light.
HEPA filter maintenance
Each HEPA filter lasts up to 200 hours or about 3 months, depending on use.