Go to http://www.almeo-research.com for simple way to see the difference between oxyhydrogen and HHO.

HHO technology is based on the concept of HHO. I think many people are confused about the concept, e.g., wikipedia tells you that HHO is fringe science. Lab evaluations that supposedly debunked HHO were probably using oxyhydrogen instead of HHO. http://www.hho-research.org/wp12.pdf Since none of these studies actually checked to see what they were testing, who knows?