Air purifiers are a great investment. I have one in my home and it does a lot more than what you might think. It might be able to pull things out of the air, but it can also protect you from bacteria and viruses. Carbon filters are great, considering they can be used with water as well.
Carbon is very porous and can pull in many impurities from the air. This includes allergens and other things. With an activated carbon filter, you can clean a room’s environment really easily. You can use these filters, or go with a HEPA filter. My particular air purifier has both.
I was able to distinguish what I wanted by reading the post at http://www.damagecontrol-911.com/hepa-activated-carbon-filters-for-the-home/
Activated carbon filters have a charge that moves through them, causing them to absorb impurities and chemicals. This does mean that the carbon filters do have to be replaced on occasion, but most filters do anyway. HEPA filters, however, can be permanent and long-lasting.
They work well together, considering HEPA filters can catch any impurity that carbon filters don’t catch. However, carbon filters are usually better at catching gasses like smoke and chemicals, while HEPA filters catch the solid microbes like bacteria and mold spores. They go hand-in-hand at taking all the impurities from the air.