DiscountFilters
Details: 10% off order... it may be a one use coupon.... not sure
Discount Filter Store
Details: $24 Off on FAP02-RS (16x10 rooms) Filtrete Ultra Clean Air Purifier.
FiltersFast
Details: Up to 20% Off Replacement filters for Cuisinart Coffeemakers equipped with the Charcoal Water Filtration System
Water Filters Fast
Details: Take $1 off any purchase
FridgeFilters.com
Details: $1 off any order
FiltersAmerica.Com
Details: Discount not specified.
AllFilters.com
Details: Get Up to $24 Off Aqua Fresh Water Filters
Air Filter Store
Details: Up to 48% Off Select Honeywell Air Filters & Purifiers
Best Filters
Details: $20 Off Blueair 200/300 Series Replacement GO SmokeStop Filter + Free Shipping
Ezvacuum
Details: $1 OFF
FiltersUSA.Com
Details: Received $3.00 off my order
All Kinds Of Filters
Details: 10% off at all kinds of filters.
Water Filter USA
Details: $47 Off Pelican Premium Whole House Filter Softener + Free Shipping
Factory Direct Filters
Details: 5% Off Everything
Nordicpure
Details: 6% Off MSRP Lightning Air SP Ceramic Plates plus Free Shipping
The Pure Air Store
Details: Up to 38% Off Select Clearance Items Plus Free Shipping on Orders Over $59
Air Filters by OxyClean
Details: Free Shipping on Orders of $99 or More on Selected Items
Filters Direct
Details: 10% off all of our 1" filters. Use promo code. Ends 12/31/2013.
HEPA Filter Sales
Details: $5 OFF
The Purchase Advantage
Details: 20% Off When You Buy 10 Cases of Calypso Blue Cartridges
Gutter Stuff
Details: Free Shipping on $190+
Reliant Energy
Details: Code for Febreze air filters