CityCarb / CitySorb Molecular (Carbon) Filter

CityCarb and CitySorb form Camfil's activated-carbon molecular filtration range for commercial and public buildings, each targeting the gas-phase contaminants that particulate filters cannot address. The distinction between the two lies in construction: CityCarb is a combination 2-in-1 unit integrating a V-bank carbon section with a particulate media layer in a header-frame housing, handling both dust and gaseous contamination in a single filter slot; CitySorb is a dedicated molecular-only box-type filter for air handling units and housings where particulate duty is handled by a separate upstream stage.

Both products operate via Rapid Adsorption Dynamics (RAD) — a broad-spectrum activated carbon layer engineered for high surface area and rapid gas-molecule contact time, giving effective removal of the full urban chemistry spectrum: ozone, VOCs, nitrogen dioxide, sulphur dioxide, and organic acid gases. Performance is validated per ASHRAE 145 and ISO 10121.

Airport terminals present one of the most demanding molecular-contamination environments in commercial building HVAC: jet engine exhaust hydrocarbons penetrate terminal facades through air curtain gaps and fresh-air intakes; ground-support diesel vehicles contribute NO₂ and particulate-bound organics; passenger volumes generate CO₂ and body-odour compounds. Recirculation and outdoor-air applications both apply. For GCC operators, the same chemistry appears in proximity to APU exhaust on congested aprons and maintenance bay ventilation. CityCarb/CitySorb fit standard AHU header frames, enabling molecular-filtration upgrades without housing changes.