E, there are actually 2 boards on this site. This is what is known as the old board and, surprise, the other is the new board. It is arranged by gereral topics. This is arranged by how questions come up. Some of the regular posters like one but not the other and this is the reason that the old board is still up. The intro message is always at the top when it comes up for me. And BV has not been on here in a couple of years, so don't expect a response from him.
As far your instant water heater, I'm sure that Brian, our resident expert on the subject will find this shortly and be able to give you all the info you need. Brian, you are hereby authorized to spam up the response all you want. LOL