Today only, select 4 Packs of Honeywell Air Filters drop from $37.29 to $22.99 at HomeDepot.com, plus shipping is free, which matches the last time we saw this deal. They have excellent reviews. You can view all available sizes by scrolling at the bottom of the page. Please note, these may sell out quickly. Most packs include 4 filters, which is the recommended yearly supply and they are effective against dust/lint, airborne dust mite debris, pollen, pet dander, mold spores and bacteria. Sales tax is charged in most states.