HEPA filters mostly capture particulates or solid air contaminants while activated carbon filters focus on odor and chemical compounds elimination. No, HEPA filters aren’t the same as activated carbon filters. Are HEPA Filters Same as Activated Carbon Filters? I recently wrote a resource that lucidly explains the difference between HEPA and HEPA-type air filters. Don’t confuse HEPA filters with HEPA-type filters because they’re different. What’s a HEPA Filter?Īccording to the Environmental Protection Agency, a HEPA filter should have a demonstrable minimum filtration efficiency of 99.97% in catching airborne particles sized 0.3 microns in diameter. It’s your best bet when dealing with lingering cooking smells, pet odors, MJ smoke, and stinky tobacco smells. High-grade activated charcoal eliminates gaseous pollutants and odors remarkably well. These bothersome organic chemical compounds include toluene, xylene, benzene, and formaldehyde. This incredible microporosity provides storage for adsorbed chemical pollutants. The central aim of activating ordinary carbon is to build up its microporosity. One gram of activated carbon filter provides a surface area of between 10,226-21,528 sq. Manufacturers blow steam through the carbonaceous material to create numerous tiny pockets that substantially increase the media’s surface area. Options made from coconut carbon tend to be better than those made from wood or coal. These sources include wood, coconut, and coal. Manufacturers use any of three kinds of carbon sources to make activated carbon. How is an Activated Carbon Filter Made?Īctivated carbon or charcoal is manufactured from small pieces of carbon-rich materials. The right amount of airflow allows for enough dwell time so that the media can remove as many pollutants as possible. In contrast, during adsorption, the adsorbed substance chemically attaches to innumerable micropores in the adsorption site.įor comprehensive odor and VOC filtration, the airstream shouldn’t pass through the carbon filter too fast. The way water seeps into a sponge would be a good analogy for this process. During absorption, whatever is being absorbed never becomes chemically bonded with the absorbent. Adsorption causes filtered pollutants to stick to the sorbent and remain there.Īdsorption is completely different from absorption. Instead, a charcoal filter gets rid of unpleasant odors and gaseous pollutants through a chemical process called adsorption. Unlike HEPA, this isn’t a mechanical filter.
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