pre-filter life span when engraving wood

Hi all,

I'm in the process of costing out something like a BOFA for a 2 year period vs making my own pre-filter/filter/carbon filter stack. I do like the idea of being able to choose my own blower strength on the diy version and soundproofing the living heck out of it. I also like the cheaper filter prices and bulk carbon. I'm just also curious about the all-in-one side of things in case my creation isn't airtight enough.

If I'm rastering wood 7-8 hours a day, how long could I expect the pre-filter on something like a BOFA to last? I did bookmark the after-market filters to get the price down a bit, I'm just not sure of what a reliable life expectancy might be. In some threads I read about people clogging up a pre-filter in a weekend of engraving wood. Surely it can't be that bad?

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pre-filter life span when engraving wood