As of 2016, certain Honeywell air purifiers are meant to have permanent air filters, while other models eventually require replacement. Honeywell HEPA filters can be reused up to five years with proper care, whereas pre-filters require regular replacement.
Provided the HEPA filter in a Honeywell air purifier is vacuumed several times a year, it can be reused. The pre-filter cannot be reused because the carbon is no longer effective after three months. The Honeywell Store website lists filter model numbers for HEPA filters and pre-filters that should be replaced on a given purifier. Other air purifier models listed on the Honeywell Store website, such as the QuietClean Tower Air Purifier, claim to have permanent filters that can simply be rinsed clean with water and reused.