I don't think I have ever seen a true fire panel with 12vdc output, most of the time a 12vdc panel is a residential burg panel with a fire zone. It is a bit easier to get parts for a 24vdc system, there are very few companies that make a 12vdc horn/strobe, System Sensor is the only one that I can think of off the top of my head. It is also easier to get 24vdc smokes. Is this a residential or commercial installation?
