Hello MMD,  I too have just read through the MMD Archives about using
ozone to remove odors.  From what is stated there and various
promotional statements for various products, it is clear to me that
ozone and other free ion devices will help eliminate odors and settle
particulate matter from air.  There are numerous products advertised
which make these claims.

I looked up the one from the Eclipse web site and the brief sales
promotion certainly wouldn't allay any of my fears.  The suggestion
that they remove odors definitely does not mean that they are safe to
use.

Although the pleasant smell of nitrogen oxide (a product of O3 and
atmospheric nitrogen after a thunderstorm or a model train derailment)
is probably familiar to all of us because of its lovely fresh air
smell, a room full of ozone is definitely not a good thing.  This was
pointed out in several of the MMD articles as long as 6 years ago.

First of all, it is corrosive to the tissues in your lungs if
concentrated or breathed for any length of time.  Second, it is very
corrosive to both metallic and non-metallic materials of your musical
organs.  You can read the archives for several examples, so I won't
repeat those here.  But I will give you a first hand experience.

When I worked for a large copier maker in the early 1970's, I had to
walk through a large office area to get to my department.  In that
office was a large, general use copier, housed in one of the 5-foot
tall partition offices.  For several days I noticed a strong 'ozone'
smell as I walked past that area so I finally asked the guy who had the
office directly across from it if someone had called to get the machine
fixed.  I think he said they were waiting for parts or something like
that.  He didn't seem too concerned.  So I asked if he wasn't bothered
by it.  He didn't seem to mind the smell but he did mention that the
air in the room was unusually dry recently.

I mentioned that it was probably the strong ozone that was drying his
throat and lungs.  He was skeptical until I pointed to his desk, one
of those "Steelcase" numbers with painted drawers and shiny, chrome
plated legs.  The chrome on the legs was all rusty, as were all the
exposed metal parts of the partition walls and chairs nearby, including
the one he was sitting in at the time.

I can't recall if it was he or I who walked over and shut off the
copier machine.

So, if you want to keep the musty smell of your shed from smelling up
your organ, you can probably use the ozone generator to remove the
odors, but do it _before_ you put any parts in there and don't spend
too much time in there with the ozone on.  And don't leave your tractor
or tools in there either.  Treat it like any strong solvent.

Regards
Craig Smith
near Rochester, New York

By the way: And you should probably put a vapor barrier on the floor so
the dampness itself doesn't do any damage or make it musty again.