Honeywell has upgraded their HAC-504 to HAC-504AW, and now has an 'airwashing' outer filter layer to capture dirt, dust and pollen. This filter has a round, cylindrical, or a "donut" shape. Packaged one filter per box.

Reinforced for maximum efficiency and longer life. Exclusive 'Dry-Lift' handle helps to keep hands dry and clean while changing your filter. ProTec antimicrobial technology prevents surface growth of mold, fungus, algae and bacteria. Lasts the life of the filter.

Honeywell recommends replacement of filter every two months (depending on use and local water quality) or when perfomance starts to deteriorate.

Save $2.00 per box when you order 2 or more. We get these in cartons of 4 from Honeywell, so your best value ($13.00 each) is on a full case of 4, which you may purchase below.