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Hi all can someone enlighten me please?
I know a fair bit about asbestos, worked with it and lost a colleague to it, so I am careful (some would say paranoid) in my late 60's I guess the odd bit extra ain't going to make much difference to me though! I do nonetheless don't want anyone else exposed to it so always advise caution.
My question is why are domestic HEPA filters not suitable for asbestos?
Most claim to protect down to 0.3 microns and that is about the size of an asbestos fibre, some class H machines only state they filter to less than 1 micron which doesn't make sense either.
You would expect them to filter to 0.2 or smaller.
It may be due to the fact that many domestic vacs are poorly made and leak out before the filter that it is the vac and not the filter that is the weak link.
I have read any number of postings on the subject some saying that HEPA filters are tested with round particles and asbestos are long or irregular, still isn't size the minimum dia whatever shape it is?
My brain hurts!
I know a fair bit about asbestos, worked with it and lost a colleague to it, so I am careful (some would say paranoid) in my late 60's I guess the odd bit extra ain't going to make much difference to me though! I do nonetheless don't want anyone else exposed to it so always advise caution.
My question is why are domestic HEPA filters not suitable for asbestos?
Most claim to protect down to 0.3 microns and that is about the size of an asbestos fibre, some class H machines only state they filter to less than 1 micron which doesn't make sense either.
You would expect them to filter to 0.2 or smaller.
It may be due to the fact that many domestic vacs are poorly made and leak out before the filter that it is the vac and not the filter that is the weak link.
I have read any number of postings on the subject some saying that HEPA filters are tested with round particles and asbestos are long or irregular, still isn't size the minimum dia whatever shape it is?
My brain hurts!