Search Results for '18 by 18 frame'

• 

  18x25x1 AIRx ALLERGY Air Filter - MERV 11

  $14.49 / Filter

  

  9 review(s)

  ◆

   

  Average rating 4.7/5

  5 stars

  (7)

  4 stars

  (1)

  3 stars

  (1)

  2 stars

  (0)

  1 star

  (0)

  in stock
• 

  18" X 24" X 2" MERV 11 Pleated Filter For Geothermal Systems

  $18.08 / Filter

  6-8 Weeks To Ship
• 

  18" X 25" X 1" MERV 11 Pleated Filter For GeoThermal Systems

  $18.08 / Filter

  6-8 Weeks To Ship
• 

  18" X 24" X 2" MERV 13 Pleated Filter For Geothermal Systems

  $21.69 / Filter

  6-8 Weeks To Ship
• 

  18" X 20" X 1" Lifetime Permanent Washable Filter

  $56.95 / Filter

  

  8 review(s)

  ◆

   

  Average rating 4.3/5

  5 stars

  (5)

  4 stars

  (2)

  3 stars

  (0)

  2 stars

  (0)

  1 star

  (1)

  in stock
• 

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

  $55.48 / Filter

  in stock
• 

  18" X 32" X 1" MERV 8 Pleated Filter For Geothermal Systems

  $16.54 / Filter

  

  1 review(s)

  ◆

   

  Average rating 5.0/5

  5 stars

  (1)

  4 stars

  (0)

  3 stars

  (0)

  2 stars

  (0)

  1 star

  (0)

  6-8 Weeks To Ship
• 

  18" X 20" X 2" MERV 11 Pleated Filter For Geothermal Systems

  $20.58 / Filter

  1 Week to Ship
• 

  18x24x3 MERV 11 Return Air Grille Filter, 2-Pack

  $43.77 / Filter

  2-3 Weeks to Ship
• 

  18x24x4 AIRx HEALTH Air Filter - MERV 13

  $28.31 / Filter

  

  2 review(s)

  ◆

   

  Average rating 5.0/5

  5 stars

  (2)

  4 stars

  (0)

  3 stars

  (0)

  2 stars

  (0)

  1 star

  (0)

  in stock
• 

  18x18x3 MERV 11 Return Air Grille Filter, 2-Pack

  $43.77 / Filter

  2-3 Weeks to Ship
• 

  18" X 32" X 2" MERV 13 Pleated Filter For Geothermal Systems

  $25.71 / Filter

  6-8 Weeks To Ship