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20x20x4 - 3M Filtrete

3M Filtrete 20x20x4 Furnace Filter Case of 4.

Out of Stock

  • Genuine Original 3M Filtrete 20 x 20 x 4 
  • Actual/Exact Size 19 1/2" x 19 1/2" x 3 5/8" 
  • Equivalent to MERV 11
  • Case of 4
  • Pick Up In Store $140.00


Sold Out

20x20x4 Furnace Filter 20 x 20 x 3.68" MERV 8 Rated Pleated Filters. Case of 4

In Stock

  • Exact Size Replacement for 3M Filtrete 20 x 20 x 4 Air Cleaning Filters
  • Actual/Exact Size 19 1/2" x 19 1/2" x 3 3/4"
  • MERV 8 Rated
  • Manufactured in Canada by Furnace Filters.Ca
  • Case of 4
  • Pick Up In Store $39.00

20x20x4 Furnace Filter 20 x 20 x 3.68" MERV 11 Rated Pleated Filters. Case of 4

In Stock

  • Exact Size Replacement for 3M Filtrete 20 x 20 x 4 Air Cleaning Filter
  • Actual/Exact Size 19 1/2" x 19 1/2" x 3 3/4" 
  • MERV 11 Rated
  • Manufactured in Canada by Furnace Filters.Ca
  • Case of 4
  • Pick Up In Store $55.00