Filtrete Ultimate Allergen Reduction Filter - 18x24x1
If you've found this page, then you're the kind of person who wants the best filter money can buy… you just don't want to pay full price for it.
The Filtrete Ultimate Allergen UA21DC fits heating / air-conditioning systems that use 1 inch replacement filters.
The Ultimate Allergen UA21DC is compatible with the following:
The following are compatible with the Filtrete Ultimate Allergen 18x24x1…
Country of Origin