That’s a great question. A lot of air purifiers air cleaners have activated carbon filters to aid remove chemicals, odors, smoke, etc, and often it’s hard to determine if it’s still working or otherwise not or exactly when you need to alter them. The manufacturers usually give a suggested period of time for changing filters, but then claim that how long an activated carbon filter lasts really depends on the level of pollutants in the area, which is actually a little confusing.
A great rule of thumb would be to change out all filters, activated charcoal once each year, particularly when you’re really sensitive to indoor air pollution. If you’re extremely sensitive, don’t take a risk-change your filters at any time symptoms even start to reappear.
Throughout us that may not be able to tell if we’re really sensitive or otherwise, yet still need a better concept of how long our activated carbon/charcoal filters last and really when you should change them, there exists a method to ‘test’ it-by how good it really is still removing odors and smells.
Military grade carbon in gas masks, and then in good carbon/charcoal air cleaner filters work by absorbing or attracting airborne chemical residues within the air. And since odors and smells are available from airborne chemical molecules and residues, if an activated carbon/charcoal filter inside your air purifier remains working well, it will be able to mostly or completely remove an odor or smell in a matter of minutes, right?
So, one way to ‘test’ your activated carbon/charcoal air filter is to put your air purifier either in the kitchen area after you’ve finished cooking, making coffee, or spray just a little air freshener or cologne into the air close to you, then turn air purifier on high for 15 minutes or so. When the smell disappears altogether completely or perhaps is very noticeably reduced, the activated carbon/charcoal filter is most likely still doing its job trapping the airborne chemical molecules in charge of the smell.
You can test the filter again later and if it takes longer to eliminate the odors, that informs you that the carbon is ‘filling’ up as well as the air is having to circulate with the air cleaner more times to iiaqqj clean. True military grade carbon or charcoal filters (as in Austin Air purifiers) can do a more satisfactory job and keep going longer, but once you start to observe that odors aren’t disappearing like they used to, that carbon filter is most likely ‘full’ and needs to be changed to successfully and your family are still breathing clean air.
It is very important, however, if you’re employing an air cleaner for severe medical issues, chemical sensitivities, or perhaps in an industrial application where hazardous airborne chemicals can be found, to change the carbon filters or at a minimum install fresh bulk carbon on schedule or even a little before to ensure compared to the air cleaner isn’t circulating more pollutants than usual since the carbon filter is saturated and just blowing polluted air through the unit.
Additionally, there are various electronic and saturation / color change type chemical and VOC detectors and then for any industrial applications where dangerous vapors or gases can be found, we strongly suggest using individuals with your air cleaner to inform you when the filter has stopped eliminating the pollutants, or maybe the air cleaner isn’t sufficiently removing them.