I believe I remember something about ozone causing rubber to
disintegrate.  Perhaps also hastening oxidation of cloth, felt, rubber,
leather, or neoprene.  I wonder if anyone knows more.  Getting rid of
musty smells is good but if it causes restoration to be needed more
often than 30-50 years then would it be worth it?

Perhaps a dehumidifier would be more appropriate.

D.L. Bullock    St. Louis
www.thepianoworld.com