Sunny, best place for info. on godzilla is the best site---how  to build 
your own--& how to use it---with super help from BG & other  knowledgeable 
folks... .....Lois--here's the site---_germkiller  sign in_ 
(http://health.groups.yahoo.com/group/microelectricitygermkiller/?v=1&t=search&ch=web&pub=groups
&sec=group&slk=1)