BAS integration to other BAS or to controls provided with mechanical/electrical equipment (“Factory Mounted Controls” or “FMCs”) was a driving force behind the development of BACnet. Nevertheless, with few exceptions, integration continues to be a challenge for both designers and contractors. Paul Ehrlich’s column a year ago covered this subject, but I think it’s worth revisiting with some other/further insights into the issue. This month, I will cover the issue of integration to FMCs.