diffusing essential oils

I have several friends who claim great success keeping their families healthy by using essential oils in a diffuser. In doing some research on the web, I found that there are certain oils that can be greatly helpful for those with CF, but I also found that there can be some concern for CF kids about any diffuser that uses water along with the oil? Not sure why? Anyone here use a diffuser or know which ones do or do not use water? or if that's even being overly worried and I can really pick whatever diffuser I want? ;) TIA - Heidi mom of Dekorrah - 5mo son with Delta F-508 CF
Source: Cystic Fibrosis Alternative Medicine Forum - Category: Respiratory Medicine Authors: Tags: Alternative Medicine Source Type: forums