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Now Showing: 18" x 18" x 1" Filters
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  Product Quantity Price Efficiency [?] Purchase
Fiberglass 18" X 18" X 1" Panel Filter- Equipment Protection [More..] 12 filters $2.69 each
($32.28 total)
MERV 4
15%
18x18x1 AIRx DUST Air Filter - MERV 8 [More..] 12 filters $6.05 each
($72.60 total)
MERV 8
40%
Best $$ Value! (based on efficiency and price)
18x18x1 AIRx ALLERGY Air Filter - MERV 11 [More..]
12 filters $6.95 each
($83.40 total)
MERV 11
75%
18x18x1 AIRx DUST Air Filter - MERV 8 [More..] 6 filters $7.05 each
($42.30 total)
MERV 8
40%
18x18x1 AIRx ALLERGY Air Filter - MERV 11 [More..] 6 filters $8.95 each
($53.70 total)
MERV 11
75%
18x18x1 AIRx HEALTH Air Filter - MERV 13 [More..] 12 filters $12.00 each
($144.00 total)
MERV 13
90%
18x18x1 AIRx HEALTH Air Filter - MERV 13 [More..] 6 filters $13.25 each
($79.50 total)
MERV 13
90%
18x18x1 AIRx ODOR Air Filter - Carbon MERV 8 [More..] 12 filters $13.45 each
($161.40 total)
MERV 4
18 x 18 x 1 Filtrete Micro Allergen Reduction Filter - #9817 [More..] 6 filters $13.55 each
($81.30 total)
MERV 11
75%
18x18x1 AIRx ODOR Air Filter - Carbon MERV 8 [More..] 6 filters $14.95 each
($89.70 total)
MERV 4
18 x 18 x 1 Filtrete Ultra Allergen Reduction Filter - #2017 [More..] 6 filters $16.95 each
($101.70 total)
MERV 11
85%
18" X 18" X 1" Lifetime Permanent Washable Filter [More..] 1 filter $39.99 each
($39.99 total)
20%