That’s a great question. A lot of air purifiers air cleaners have activated carbon filters to help remove chemicals, odors, smoke, etc, and quite often it’s difficult to determine if it’s still working or otherwise or exactly when you need to alter them. The manufacturers usually provide a suggested period of time for changing the filters, but then claim that how much time an activated carbon filter lasts really depends on the level of pollutants in the area, that is a little confusing.
A great principle would be to change out all filters, charcoal powder once annually, particularly when you’re really sensitive to indoor air pollution. If you’re extremely sensitive, don’t take a chance-change your filters at any time symptoms even start to reappear.
For the rest of us that may be unable to determine if we’re really sensitive or otherwise, yet still want a better idea of how long our activated carbon/charcoal filters last and incredibly when to change them, you will find a way to ‘test’ it-by how good it really is still removing odors and smells.
Military grade carbon in gas masks, as well as in good carbon/charcoal air purifier filters work by absorbing or attracting airborne chemical residues within the air. And since odors and smells come from airborne chemical molecules and residues, if the activated carbon/charcoal filter inside your air cleaner is still working well, it will be able to mostly or completely remove an odor or smell in a case of minutes, right?
So, one way to ‘test’ your activated carbon/charcoal air filter is to place your air cleaner either in your kitchen after you’ve finished cooking, making coffee, or spray a bit air freshener or cologne into the air close to you, then turn the air purifier on high for fifteen minutes or so. In the event the smell goes away completely completely or perhaps is very noticeably reduced, the activated carbon/charcoal filter is probably still doing its job trapping the airborne chemical molecules accountable for the smell.
You are able to test the filter again later and in case it requires longer to eliminate the odors, that lets you know that the carbon is ‘filling’ up as well as the air is needing to circulate with the air purifier more times to iiaqqj clean. True military grade carbon or charcoal filters (as in Austin Air purifiers) is going to do a more satisfactory job and stay longer, but once you begin to observe that odors aren’t disappearing like they employed to, that carbon filter is probably ‘full’ and has to be changed to ensure that you and your family are still breathing clean air.
It is vital, however, if you’re utilizing an air cleaner for severe health issues, chemical sensitivities, or in a commercial application where hazardous airborne chemicals exist, to switch the carbon filters or at a minimum install fresh bulk carbon on schedule or perhaps a little before to ensure compared to the air cleaner isn’t circulating more pollutants than usual as the carbon filter is saturated and simply blowing polluted air from the unit.
There are also various electronic and saturation / color change type chemical and VOC detectors as well as for any industrial applications where dangerous vapors or gases exist, we strongly recommend using those with your air cleaner to inform you when the filter has stopped removing the pollutants, or if perhaps air cleaner isn’t sufficiently removing them.