pdgood Monday, 12/06/10 07:07:21 PM Re: danceswithmoney post# 404 Post # of 491 By that I mean this. Many systems vent off the oxygen and use pure hydrogen gas so the don't have o2 sensor problems ta deal with. You may be mistakin knowledge for con man tactics. I'm use to it. I've tried to make it simple so it doesn't all fly over your head. Seems I've failed.