Quote Originally Posted by RoddyHHO View Post
From what I understand, the disadvantage of having plates simply submerged in an electrolyte is that the edges of the plates electrolize less efficiently than the middle of the plates. I believe this is what they call leakage current. Essentially this portion of your plates are generating leakage current, which is not making HHO, but does make a lot of heat.
I think you are correct, which would explain why some people seal the edges, except for a slot across the plates so the HHO gets out.