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Carbon & Gas-Phase Air Filtration | VOC, Odor, Industrial

Carbon air filtration is its own discipline within commercial and industrial HVAC — targeting gas-phase contaminants (volatile organic compounds, odors, ammonia, formaldehyde, hydrogen sulfide, sulfur dioxide, diesel exhaust, amines, acid gases) that standard particulate filters can't remove. RTF carries the full Koch carbon catalog, from 1″/2″/4″ pleated carbon panels through 12″-deep V-cell extended-surface carbon filters for sub-ppm airborne molecular contamination (AMC) in cleanrooms, museums, hospitals, and industrial process applications.

Choose by depth and application

  • 1″/2″/4″ pleated carbon panels — standard HVAC drop-in replacement form factor with carbon impregnation. Browse the OdorKleen family (ES, 250 CarbonWeb, 200/M13 MERV 13, 600 CarbonWeb MERV 10) for office buildings, schools, hospitality, and standard commercial HVAC needing odor and VOC control.
  • 12″ V-cell carbon filters — high-volume gas-phase capacity for industrial scale. Browse the V-cell family: DuraPure (honeycomb cells, premium 60% activated coconut shell carbon, up to 26 lbs per filter) for airports and chemical plants; DuraKleen (CPS technology, 500 gsm 20x50 mesh, sub-ppm AMC) for cleanrooms and museums; or DuraKleen V (pleated coconut shell carbon, MERV 8/15) for combined particulate + gas-phase HVAC.
  • By MERV — if you need a specific particulate efficiency rating alongside carbon performance.
  • By application — cleanroom, hospital, pharmaceutical, museum/archive, industrial process, or general VOC/odor removal.

What we ship

RTF is an authorized Koch dealer with 20 years of experience specifying carbon filtration for commercial and industrial applications. Our commercial team works with hospitals, pharmaceutical manufacturers, semiconductor and cleanroom operators, museums and archives, airport facilities, chemical plants, and government/military buyers (Section 889/NDAA, COI, net terms, tax-exempt all available). Family-founded in 2006 with 50+ years of commercial HVAC and industrial filtration domain expertise.

Need help specifying?

If you're unsure which carbon filter fits your contaminant profile and HVAC system, contact our commercial team with your target gases, contaminant concentrations, airflow requirements, and operating temperature, and we'll match the right Koch product. For specialty impregnated carbon (KMnO4 alumina for ammonia, specialized media for amines and acid gases) or facility-scale orders, request a quote.