On 29 Sep 97 at 11:39, Martin R. Green wrote: > Yes, ozone _is_ poisonous. I remember about 15 years ago everyone > with allergies was advised to install an electrostatic air filter on > their furnaces since these devices do a great job of removing tiny > particulates that conventional filters can't touch. Well, after a > few years of real world experience, it was discovered that the ozone > produced by these devices was more irritating to those with > allergies than the particles they were removing. Properly designed ES filters don't do this - if you can smell ozone - its a bad one. BTW, you can smell it way before its toxic - pity something that smells so nice is toxic... MikeS (remove the you know what before replying)