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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 $3.11 each
($37.28 total)
MERV 4
15%
18x18x1 AIRx DUST Air Filter - MERV 8 [More..] 12 filters $6.55 each
($78.60 total)
MERV 8
40%
Best $$ Value! (based on efficiency and price)
18x18x1 AIRx ALLERGY Air Filter - MERV 11 [More..]
12 filters $7.45 each
($89.40 total)
MERV 11
75%
18x18x1 AIRx DUST Air Filter - MERV 8 [More..] 6 filters $8.05 each
($48.30 total)
MERV 8
40%
18x18x1 AIRx ALLERGY Air Filter - MERV 11 [More..] 6 filters $9.95 each
($59.70 total)
MERV 11
75%
18x18x1 AIRx HEALTH Air Filter - MERV 13 [More..] 12 filters $12.50 each
($150.00 total)
MERV 13
90%
18x18x1 AIRx ODOR Air Filter - Carbon MERV 8 [More..] 12 filters $13.95 each
($167.40 total)
MERV 8
18x18x1 AIRx HEALTH Air Filter - MERV 13 [More..] 6 filters $14.25 each
($85.50 total)
MERV 13
90%
18 x 18 x 1 Filtrete Micro Allergen Reduction Filter - #9817 [More..] 6 filters $14.55 each
($87.30 total)
MERV 11
75%
18x18x1 AIRx ODOR Air Filter - Carbon MERV 8 [More..] 6 filters $15.95 each
($95.70 total)
MERV 8
18 x 18 x 1 Filtrete Ultra Allergen Reduction Filter - #2017 [More..] 6 filters $18.28 each
($109.66 total)
MERV 11
85%
18" X 18" X 1" Lifetime Permanent Washable Filter [More..] 1 filter $39.99 each
($39.99 total)
20%