RichH wrote:

I work in biologically controlled water system. Peggy sells toilets.

Typical atmospheric air will contain 30,000 particles per sq. ft. with a
small percentage of Stochybotris Autra and various Aspergillis spores.
These are removed by filtration. There is NO place on earth where these
spores are not present. Most folks are tolerant of these species, some
are extremely reactive - hence cumulative dosage can be fatal for some.
Play the odds and risk the 'trots' or worse - your choice.
An independent 'collection' tank, then filtration into a (sanitized)
storage tank is the prime recommendation.


What would you recommend? I assume a pre filter and then a fine filter.
In your earlier post you gave the figures as "2-3 micrometers
absalute".When I see filters in our local hardware store they say what
they will do,i.e, protect from cysts, but not the actual size. Are
filter elements standard sizes?
Tony