I have a U shaped building that has a computerized HVAC control panel in the basement at the far end of one of the U legs. The basement is concrete and also has a concrete ceiling. My goal is to be able to get an ethernet connection from the HVAC control panel in the basement to a wired port that is in the center of the U one or two floors up. Power line ethernet adapters won't work because the circuits are not the same and I'm seeking a way to control the HVAC panel via ethernet from the building itself. I thought of using two wireless routers--one with the internet port attached to the ethernet connection in the HVAC panel and the other to receive the signal at the second floor and plug into the hard wired ethernet port there to take it out to the internet. Can routers be used this way? I have two Belkin wireless-N routers. If not, any other suggestions? Mounting an external antenna would be a last resort because of the builiding codes and expense.