Here’s how they work and why they’re used:

Adsorption Process: Activated carbon has a highly porous structure that gives it a large surface area, allowing it to capture and hold on to gas molecules and volatile organic compounds (VOCs) like smoke, cooking odors, and other chemical fumes. Odor and Gas Removal: Carbon-filled final filters are especially useful in environments where odors, gases, and fumes are a concern. This includes commercial kitchens, manufacturing facilities, hospitals, and other spaces where clean-smelling and low-pollutant air is needed. Combination Filters: These filters can sometimes be combined with particulate filters (like HEPA or MERV-rated filters) to provide both particulate and gas-phase filtration, making them versatile for comprehensive air cleaning. Replacement Cycle: Carbon filters must be replaced periodically because, over time, the activated carbon becomes saturated and loses its adsorption capacity, reducing its effectiveness in capturing odors and gases.