That’s an excellent question. A lot of air purifiers air cleaners have activated carbon filters to help remove chemicals, odors, smoke, etc, and often it’s hard to determine if it’s still working or not or exactly when you need to change them. The makers usually provide a suggested time frame for changing the filters, but then suggest that how much time an activated carbon filter lasts really depends on the amount of pollutants in the area, which is actually a little confusing.
An excellent principle is to change out all filters, charcoal teeth whitening once each year, especially if you’re really sensitive to indoor air pollution. If you’re extremely sensitive, don’t take a chance-improve your filters any moment symptoms even begin to reappear.
For the rest of us which could not be able to know if we’re really sensitive or otherwise not, but nonetheless want a better idea of how much time our activated carbon/charcoal filters last and extremely when to change them, there is a way to ‘test’ it-by how good it is still removing odors and smells.
Military grade carbon in gas masks, as well as in good carbon/charcoal air cleaner filters work by absorbing or attracting airborne chemical residues inside the air. And also, since odors and smells also come from airborne chemical molecules and residues, if an activated carbon/charcoal filter within your air cleaner continues to be working well, it should be able to mostly or completely remove an odor or smell in a matter of minutes, right?
So, one method to ‘test’ your activated carbon/charcoal air filter is to put your air cleaner either in the kitchen area after you’ve finished cooking, making coffee, or spray a bit air freshener or cologne to the air around you, then turn air purifier on high for fifteen minutes or so. If the smell goes away completely completely or is very noticeably reduced, the activated carbon/charcoal filter is probably still doing its job trapping the airborne chemical molecules responsible for the smell.
You are able to test the filter again later and when it requires longer to get rid of the odors, that informs you that this carbon is ‘filling’ up and also the air is being forced to circulate with the air purifier a few more times to iiaqqj clean. True military grade carbon or charcoal filters (like Austin Air purifiers) can do a more satisfactory job and last longer, but once you begin to notice that odors aren’t disappearing like they employed to, that carbon filter may well be ‘full’ and has to be changed to make sure you and your loved ones are still breathing clean air.
It is very important, however, if you’re employing an air cleaner for severe health issues, chemical sensitivities, or perhaps in an industrial application where hazardous airborne chemicals can be found, to switch the carbon filters or at best install fresh bulk carbon on schedule or even a little before to ensure than the air cleaner isn’t circulating more pollutants than usual because the carbon filter is saturated and merely blowing polluted air through the unit.
There are also various electronic and saturation / color change type chemical and VOC detectors and for any industrial applications where dangerous vapors or gases exist, we highly recommend using individuals with your air cleaner to inform you once the filter has stopped eliminating the pollutants, or if the air cleaner isn’t sufficiently removing them.