how often do u have to replace the filter on a hepa air purifier 50250 series? not the black cover but the fil?

One Response to “how often do u have to replace the filter on a hepa air purifier 50250 series? not the black cover but the fil?”

1. Chiefmanycrows says:

   September 30, 2010 at 5:15 am

   Typically the filter media should be replaced about every six months, once in spring and again in fall. Depending on how dirty they get, you may want to replace them more often, say every four months or even every three months, but usually six months should be about right.