Carbon filters are a type of filtration system used to remove pollutants from the air. Indoor carbon filters can be used in grow rooms or greenhouses, and come in two main varieties: activated carbon filters and pre-filter systems.
Activated carbon filters contain a highly absorbent form of charcoal that is treated with oxygen to create pores on its surface. These pores allow the filter to trap volatile organic compounds (VOCs), odors, smoke, and other airborne particles as air passes through it. Activated carbon filters are usually made up of several layers of different types of activated charcoal for maximum efficiency.
Pre-filter systems use less porous materials like foam or fiberglass as their primary filtering material instead of activated charcoal. Pre-filters capture large particles such as dust and pollen before they reach the main filter, extending its life and improving overall performance by reducing buildup on the main filter over time. Some pre-filters also feature a layer of activated charcoal to further reduce VOCs and other gases present in indoor environments.