Hi guys, I'm currently using city gas heater (installed at service yard) There is a power socket for it installed beside it. Thus i do not use both the water heater switches pre-installed outside the mbr and common toilet.. In this case, am i able to utilize the both switches to install applicances (ie ventilation fans) since the wires are already lay out (for instant/storage heater)? Anyone installed city gas heater too? and has uses for the unused water heater switches? Thanks thanks!