A central heating plant which includes a pressure reducing steam station for: Domestic hot water heaters, air-handling units, steam-hot water exchanges, unit heaters, fan coil units, radiant floor heating, and perimeter fin tube radiation ENERGY & ATMOSPHERE 6 POINTS SymmetrE™ is used as the Building Automation System for: Temperature, mechanical and electrical service and distribution systems, lighting controls, emergency generator and uninterruptible power supplies