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.

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  • Koch OdorKleen 250 CarbonWeb MERV 8 high-capacity carbon particulate pleated panel filter, 250 gsm carbon plus potassium permanganate alumina for heavy VOC and gas-phase contaminant loads, beverage board frame with cross-member, per Koch PB-1201
    OdorKleen 250 MERV 8
    Koch

    OdorKleen 250

  • Koch OdorKleen ES MERV 8 carbon particulate pleated panel filter, two-ply media with mechanical upstream layer and carbon-impregnated downstream layer for VOC and odor removal, beverage board frame, per Koch bulletin
    OdorKleen ES MERV 8
    Koch

    OdorKleen ES

  • Custom filters
    Built to your exact size

    Any size, cut to 1/8″. Depth 1″–6″ · MERV 1–13.

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  • Koch DuraKleen V15 MERV 15 pleated V-cell extended surface activated carbon filter, 12-inch deep, premium 60 percent activated coconut shell carbon encapsulated in pleated media packs, high-impact polystyrene plastic frame with single header configuration, ISO 9001 manufactured by Koch
    DuraKleen V15 MERV 15
    Koch

    DuraKleen V15

    From $929.55
    From $929.55 $0.00
  • Koch DuraKleen V8 MERV 8 pleated V-cell extended surface activated carbon filter, 12-inch deep, premium 60 percent activated coconut shell carbon encapsulated in pleated media packs, high-impact polystyrene plastic frame with single header configuration, ISO 9001 manufactured by Koch
    DuraKleen V8 MERV 8
    Koch

    DuraKleen V8

    From $687.04
    From $687.04 $0.00
  • Koch DuraKleen Double Header MERV 8 V-cell extended surface gas-phase carbon filter, 12-inch deep, Celbond Particulate Structure CPS technology with 500 gsm 20x50 mesh activated carbon, for sub-ppm airborne molecular contamination filtration, per Koch bulletin PB-1202
    DuraKleen Double Header MERV 8
    Koch

    DuraKleen Double Header MERV 8

  • Koch DuraKleen No Header Box Style MERV 15 V-cell extended surface gas-phase carbon filter, 12-inch deep, Celbond Particulate Structure CPS technology with 500 gsm 20x50 mesh activated carbon, for sub-ppm airborne molecular contamination filtration, per Koch bulletin PB-1202
    DuraKleen Box Style MERV 15
    Koch

    DuraKleen No Header Box Style MERV 15

  • Koch DuraKleen No Header Box Style MERV 8 V-cell extended surface gas-phase carbon filter, 12-inch deep, Celbond Particulate Structure CPS technology with 500 gsm 20x50 mesh activated carbon, for sub-ppm airborne molecular contamination filtration, per Koch bulletin PB-1202
    DuraKleen Box Style MERV 8
    Koch

    DuraKleen No Header Box Style MERV 8

  • Koch DuraKleen Single Header MERV 15 V-cell extended surface gas-phase carbon filter, 12-inch deep, Celbond Particulate Structure CPS technology with 500 gsm 20x50 mesh activated carbon, for sub-ppm airborne molecular contamination filtration, per Koch bulletin PB-1202
    DuraKleen Single Header MERV 15
    Koch

    DuraKleen Single Header MERV 15

  • Koch DuraKleen Single Header MERV 8 V-cell extended surface gas-phase carbon filter, 12-inch deep, Celbond Particulate Structure CPS technology with 500 gsm 20x50 mesh activated carbon, for sub-ppm airborne molecular contamination filtration, per Koch bulletin PB-1202
    DuraKleen Single Header MERV 8
    Koch

    DuraKleen Single Header MERV 8

    From $488.54
    From $488.54 $0.00
  • Koch DuraPure High Capacity extended surface V-cell activated carbon filter, 12-inch deep, premium granular 60 percent activated coconut shell carbon, plastic and metal frame with single or double header configuration, 8 lbs solvent capacity per filter, per Koch bulletin K-397-B
    DuraPure High Capacity
    Koch

    DuraPure High Capacity

    From $840.81
    From $840.81 $0.00
  • Koch DuraPure Standard Capacity extended surface V-cell activated carbon filter, 12-inch deep, premium granular 60 percent activated coconut shell carbon, plastic and metal frame with single or double header configuration, 5 lbs solvent capacity per filter, per Koch bulletin K-397-B
    DuraPure Standard Capacity
    Koch

    DuraPure Standard Capacity

    From $715.91
    From $715.91 $0.00
  • Koch OdorKleen 200/M13 MERV 13 high-capacity carbon particulate pleated panel filter, 200 gsm activated carbon and MERV 13 polyester filtration layer for ammonia, formaldehyde, SO2, and H2S removal plus fine particulate capture, recyclable beverage board frame with cross-member, UL 900 classified
    OdorKleen 200/M13 MERV 13
    Koch

    OdorKleen 200/M13

    From $659.25
    From $659.25 $0.00
  • Koch OdorKleen 600 CarbonWeb MERV 10 high-efficiency carbon/alumina pleated panel filter, 592 gsm carbon and activated alumina with 5 percent potassium permanganate for ammonia, formaldehyde, SO2, and H2S removal, recyclable beverage board frame with cross-member, UL 900 classified
    OdorKleen 600 MERV 10
    Koch

    OdorKleen 600

    From $1,160.91
    From $1,160.91 $0.00

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.