Which type of filter is known for its ability to capture odors and gaseous pollutants?

Activated carbon filters are specifically designed to capture odors and gaseous pollutants due to their unique properties. The effectiveness lies in the large surface area of activated carbon, which is achieved through a process that creates a porous structure. This porosity allows the activated carbon to adsorb various gases and volatile organic compounds (VOCs) from the air.

When air passes through an activated carbon filter, the molecules of the gases adhere to the surface of the carbon, effectively removing them from the air stream. This makes activated carbon filters widely used in applications where odor control is important, such as in air purifiers, HVAC systems, and commercial environments.

In contrast, HEPA filters primarily focus on particulate matter and do not have the capacity to effectively adsorb gases or odors. Ceramic filters are often used for water filtration or as pre-filters in some air systems but do not target gaseous pollutants. Foam filters are typically mechanical filters that trap larger particles but lack the specificity and efficiency for capturing odors or gaseous contaminants. Thus, activated carbon filters are the preferred choice for removing unpleasant odors and gaseous pollutants from the air.