I received this sauna heater by accident! It took a while to figure out that this did not go to our sauna. Tried to return to the sauna company and they said don't worry about it, it wasn't worth the effort and expense to send the truck back for it. I have not opened it, and all I know about it is what I can see from the label (as pictured). That said, I think this is the 8kw version, but you may want to do your own research.