Search Results for '18 x 21-38 x 38'

• 

  13x21.5x1 AIRx DUST Air Filter, 6-Pack

  $11.49 / Filter

  

  56 review(s)

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  Average rating 4.9/5

  5 stars

  (51)

  4 stars

  (5)

  3 stars

  (0)

  2 stars

  (0)

  1 star

  (0)

  in stock
• 

  16.375x21.5x1 AIRx ALLERGY Air Filter, 6-Pack

  $17.49 / Filter

  

  103 review(s)

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  Average rating 4.8/5

  5 stars

  (89)

  4 stars

  (12)

  3 stars

  (1)

  2 stars

  (0)

  1 star

  (1)

  in stock
• 

  20x21x5 AIRx ALLERGY White Rodgers FR1600-100 Replacement Air Filter - MERV 11

  $58.49 / Filter

  

  22 review(s)

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  Average rating 5.0/5

  5 stars

  (21)

  4 stars

  (1)

  3 stars

  (0)

  2 stars

  (0)

  1 star

  (0)

  1 Week to Ship
• 

  21x21x4.5 AIRx ALLERGY Rheem/Ruud RXHF-E21AM10 Replacement Air Filter - MERV 11

  $72.10 / Filter

  

  13 review(s)

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  Average rating 4.9/5

  5 stars

  (12)

  4 stars

  (1)

  3 stars

  (0)

  2 stars

  (0)

  1 star

  (0)

  1 Week to Ship
• 

  16.375x21.5x1 AIRx DUST Air Filter, 6-Pack

  $12.49 / Filter

  

  133 review(s)

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  Average rating 4.7/5

  5 stars

  (103)

  4 stars

  (26)

  3 stars

  (2)

  2 stars

  (2)

  1 star

  (0)

  in stock
• 

  14x18x1 AIRx DUST Air Filter - MERV 8, 6-Pack

  $13.49 / Filter

  

  28 review(s)

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  Average rating 4.9/5

  5 stars

  (25)

  4 stars

  (3)

  3 stars

  (0)

  2 stars

  (0)

  1 star

  (0)

  in stock
• 

  Fiberglass 18" X 30" X 1" Panel Filter- Equipment Protection

  $12.80 / Filter

  

  11 review(s)

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  Average rating 3.8/5

  5 stars

  (7)

  4 stars

  (1)

  3 stars

  (0)

  2 stars

  (0)

  1 star

  (3)

  in stock
• 

  18" X 18" X 2" MERV 11 Pleated Filter For Geothermal Systems

  $14.97 / Filter

  In Stock
• 

  18x30x1 AIRx HEALTH Air Filter - MERV 13

  $21.49 / Filter

  

  21 review(s)

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  Average rating 4.8/5

  5 stars

  (18)

  4 stars

  (2)

  3 stars

  (0)

  2 stars

  (1)

  1 star

  (0)

  in stock
• 

  16x18x1 AIRx DUST Air Filter - MERV 8

  $11.49 / Filter

  

  10 review(s)

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  Average rating 4.6/5

  5 stars

  (7)

  4 stars

  (2)

  3 stars

  (1)

  2 stars

  (0)

  1 star

  (0)

  in stock
• 

  18" X 20" X 1" Lifetime Permanent Washable Filter, 2-Pack

  $55.48 / Filter

  in stock
• 

  12x18x1 AIRx ALLERGY Air Filter - MERV 11

  $15.49 / Filter

  

  7 review(s)

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  Average rating 4.9/5

  5 stars

  (6)

  4 stars

  (1)

  3 stars

  (0)

  2 stars

  (0)

  1 star

  (0)

  in stock