Load 1 Load 2 Load N Power Source Analog Preprocessing A / D Conversion

At any point in the life of a building, mechanical and electrical equipment – the services infrastructure – may be poorly operated. Equipment may be inadvertently left in operation when not needed: lights and fans running all night or air conditioning in unoccupied spaces. Or equipment may be operated in ignorance of the cost, a problem exacerbated by time-varying electrical rates. Further, as buildings age, both the equipment and the building façade or envelope – a part of the construction infrastructure – wear, cease to function properly, and eventually fail, via myriad processes that are often undetected. Valves do not close fully, dampers stick, refrigerant leaks, heating and cooling coils – from the smallest refrigerator to the largest building air-conditioning system – become fouled with accumulated dirt and debris, and belts slip.