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18x18x0.5 (17.5x17.5x0.5) Accumulair Platinum Filter MERV 11
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FurnaceAir Conditioner Filters

18x18x0.5 (17.5×17.5×0.5) Accumulair Platinum Filter MERV 11

Original price was: $15.16.Current price is: $10.61.
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18x18x1 (17.75 X 17.75) DuPont™ Ultimate Air Filter (MERV 13)
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FurnaceAir Conditioner Filters

18x18x1 (17.75 X 17.75) DuPont™ Ultimate Air Filter (MERV 13)

Original price was: $19.57.Current price is: $13.70.
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18x18x2 (17.5x17.5x1.75) Accumulair Carbon MERV 10 Odor Eliminating Filter
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FurnaceAir Conditioner Filters

18x18x2 (17.5×17.5×1.75) Accumulair Carbon MERV 10 Odor Eliminating Filter

Original price was: $19.64.Current price is: $13.75.
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18x20x0.5 (17.5x19.5x0.5) Accumulair Carbon MERV 8 Odor Eliminating Filter
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FurnaceAir Conditioner Filters

18x20x0.5 (17.5×19.5×0.5) Accumulair Carbon MERV 8 Odor Eliminating Filter

Original price was: $22.25.Current price is: $15.58.
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18x20x1 (Actual Size) DuPont™ Ultimate Air Filter (MERV 13)
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FurnaceAir Conditioner Filters

18x20x1 (Actual Size) DuPont™ Ultimate Air Filter (MERV 13)

Original price was: $22.19.Current price is: $15.53.
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18x20x4 (17.5x19.5x3.75) Accumulair Gold Filter MERV 8
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FurnaceAir Conditioner Filters

18x20x4 (17.5×19.5×3.75) Accumulair Gold Filter MERV 8

Original price was: $20.67.Current price is: $14.47.
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18x25x1 (17.75 X 24.75) DuPont™ Allergen Air Filter (MERV 11)
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FurnaceAir Conditioner Filters

18x25x1 (17.75 X 24.75) DuPont™ Allergen Air Filter (MERV 11)

Original price was: $19.50.Current price is: $13.65.
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18x27x1 (Actual Size) Accumulair Gold Filter MERV 8
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18x27x1 (Actual Size) Accumulair Gold Filter MERV 8

Original price was: $17.92.Current price is: $12.54.
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18x30x4 (17.5x29.5x3.75) Accumulair Carbon MERV 10 Odor Eliminating Filter
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FurnaceAir Conditioner Filters

18x30x4 (17.5×29.5×3.75) Accumulair Carbon MERV 10 Odor Eliminating Filter

Original price was: $32.73.Current price is: $22.91.
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18x36x0.5 (Actual Size) Accumulair Diamond Filter MERV 13
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18x36x0.5 (Actual Size) Accumulair Diamond Filter MERV 13

Original price was: $27.49.Current price is: $19.24.
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18x36x1 (17.5 X 35.5) DuPont™ Odor Air Filter (MERV 10)
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18x36x1 (17.5 X 35.5) DuPont™ Odor Air Filter (MERV 10)

Original price was: $24.80.Current price is: $17.36.
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18x36x1 (Actual Size) Accumulair Emerald Filter MERV 6
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18x36x1 (Actual Size) Accumulair Emerald Filter MERV 6

Original price was: $16.52.Current price is: $11.56.