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Unfortunately, I can't. That's because most of these lower cost filter manufacturers, don't specify what grade of filter they are using. Or how effective the unit is to filter the air i.e. is 10% of dust in the air being filtered, or 95%? That is pretty damning for something that is supposed to be safety equipment.This is why I focused on pro-units - even then many don't state how effective they are, but you can weed out the poor designs by looking at how much active carbon filter they use. Less than 1kg, and for us it is not worth considering.But the table top filters that on first look seem to be more serious, still cost more than most part-time NT want to pay. Is there anything for less than 400 Pounds? Not that I have found.
Unfortunately, I can't. That's because most of these lower cost filter manufacturers, don't specify what grade of filter they are using. Or how effective the unit is to filter the air i.e. is 10% of dust in the air being filtered, or 95%? That is pretty damning for something that is supposed to be safety equipment.
This is why I focused on pro-units - even then many don't state how effective they are, but you can weed out the poor designs by looking at how much active carbon filter they use. Less than 1kg, and for us it is not worth considering.
But the table top filters that on first look seem to be more serious, still cost more than most part-time NT want to pay. Is there anything for less than 400 Pounds? Not that I have found.
