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HEPA filter does not do much for VOC. VOCs, because they are gases, are about 1000 times smaller than what HEPA filters can capture. You need carbon-based filte
by dfadsadsf 4y ago
HEPA filter does not do much for VOC. VOCs, because they are gases, are about 1000 times smaller than what HEPA filters can capture. You need carbon-based filter to neutralize them.
- not_kurt_godel 4y agoMy unit has both HEPA and carbon-based filters. The point is, my CO2 levels rise independently of any other pollutant and it's not reliably detectable by a human as far as I can tell.
- Filligree 4y agoHow often do you swap the carbon filter? My understanding, admittedly driven by 3D printing, is that they only last about a week before the substrate degrades. Fortunately activated carbon is cheap.
- not_kurt_godel 4y agoVariable, between 6 months and a year, per the manufacturer's recommendation and unit's ability to sense when the filter needs replacing. It seems like you're saying yours only last a week because you're constantly generating fumes from 3D printing? I don't do anything like that. I would be curious to get some kind of independent measurement of effectiveness of a new filter over time (and I suppose I will from my air monitor next time I replace). But again, the point is my separate air quality monitor shows increases in CO2 that are not associated with rise in any of the other 4 detectable pollutants it measures.
- Filligree 4y agoWhat I’ve been told is that the carbon filter will stop absorbing VOCs after a week, regardless of how much I use the printer. Considering that some of them are carcinogens, I’m not taking any chances. Presumably this should also hold for other carbon filters, then, but I don’t know how I would verify that.