How 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.

Variable, 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.

What 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.