I was in our computer room at work for a few hours this morning and I noticed that all the Co2 extinguishers have been replaced with misting water extinguishers (in addition to the FM100 suppression and dry pipe sprinklers). If we ever have a fire it appears we will either gas and flood the room to put it out depending on which trips first.
This extinguishers have a special deionized water charge and are rated class AC because of the misting head. The mist keeps any electrical current from coming back to the user.
These are the units we now have
http://www.amerex-fire.com/Literature/wmist.pdf
