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Kootenay Filter Green Line Carbon Filters KFI 425S - 4 Inch (250 CFM)

Product Info


The Green Line is Kootenay Filter Inc.’s Lightweight Filter Line. KFI is proud to have a product that uses only virgin activated carbon made from renewable resources. The proven design, manufacturing process and a production staff with years of experience make our product one of the best filters on the market. Our Light line filters are available with flange sizes 4″-14″ rated for 3250cfm. Our filters consist of only 2 things, steel and carbon; they are effective and robust.

KFI 425S – 4″ x 14″ Specs:

  • Carbon: Granulated Virgin Activated Carbon
  • Prefilter Installed: Yes
  • Replacement Prefilter SKU: PF425S

CFM/M3 Ratings:

  • Max Exhaust CFM – 125
  • Max Recirculate CFM – 250
  • Max Exhaust M3 – 212
  • Max Recirculating M3 – 425

Green Line Filters

  • Virgin activated carbon made from renewable resources
  • Dedusted and screened
  • Lightweight filter
  • Max operating temperature 80˚C / 176˚F
  • Max allowed humidity 70% (short term only)
  • Prefilter installed
  • Robust galvanized steel housing
  • Single packaged and sealed for storage
  • Made in North America
  • 2″ carbon bed
  • Flanges installed from 4″ to 14″