Hi all I just was thinking of application of HHO water heating and with the whole global cooling they claim now I just wanted to throw out some ideas as to what the heater would look like. I was thinking it best to keep a pilot light as natural gas or propane and run the HHO as it is produced. The thermo couple would moniter for a flame. I was thinking of a burner just past a flame arrestor in front of a bubbler. The holes on the burner would be very small as per stans quenching tube diameter. .O15 I think?? Possibly even bonze wool stuffed into burner. Another thought might be to enclose an assembly inside the water tank itself and use an electronic ignitor? Any thoughts??