For a more economical alternative for this Hunter 30931 HEPAtech Purifier Filter try the Hunter 30931.
The Hunter 30931 HEPAtech Purifier Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.1 microns. The Hunter 30931 is a genuine OEM Hunter part. The 30931 should be replaced every six months.
The Hunter 30931 filter fits the HEPAtech 251 - 30251 air purifier.