Green Building Design has become the energy conservation norm since Global Warming opened a vast & uncertain expanse at the dusk of rapid industrialization. That's increasingly threatening us like never before. Unfortunately, the major pie of its cause is related to the energy that we can't live without. Looking at the inevitable our engineering design practices are bound to take a material shift. It no longer can restrict in merely doing the job, but need to do it in an energy-efficient way. Summary: This case study is a culmination of several hundred projects carried-out by us since decades covering a motley of intelligent-buildings across the length and breadth of India and world-wide, with its Total Power Management that involved Load and Parameter Optimization. The long experience brings out sustainable ways and means those helps in removing barriers to energy efficiency. Green building revolution is spurting out across the globe but the crown tag itself is no Rosetta stone for a green energy norm. Those are in nascent stage. This case study propounds a direction towards possible development of one universal norm on a global scale. A pulse count that would broadly delineate the degree of greenness for an intelligent building. The Mean does not justify The End. For example, an inefficient building if powered by 100% green solar energy can't be tagged as efficient or for that matter a green building. It must be noted and understood, as like in any quality system, greenness can't be achieved at the delivery point or by trumpeting the purported altruism. The initial project design and equipment specifications are critical, and leaving out a much load end deficiency means those must come from the source, and that happens with substantial energy losses. In-addition those intrinsic barriers remain so long as that equipment remain in operation. Do not limit your design rather challenge your limit. Unfortunately, most intelligent buildings world-wide are designed extraordinarily ordinary and operate below 40% Load Factor. The reason for this is to keep the Harmonic Distortion problem below the carpet within its latent stage. Load Factor in an electrical system is the actual-running-loads in mW/mVA divided by sum-total mW/mVA-ratings of all Transformers/ Diesel-generators. The primary harmonic problem in an electrical power system is the rise of Voltage Harmonic Distortion (THDv) which is proportional to the building's load factor. That explains why equipment de-rating helps in skirting out the problem albeit with a guzzling energy consumption. Succinctly, and compacting from several hundred projects, these 15-case-studies with ballpark descriptions constitute most problems and challenges that building engineers and technologists alike encounter during project design, start-up, and maintenance phases, root cause, and troubleshooting methods. There is no wonder in the world that is not build through simple wonders. The simple fact is "smaller are the knots, better is the carpet". Modern world churns out sheaf of sophistication for modern buildings which are intertwined by yet more sophisticated chain of commands. The efficiency is a chain that is as strong as its weakest link. The long experience with the two-past contrasting economic phases, the recession period of 1996 -2002, and the economic surge period of 2003 -2008 brings forth a reflection. Riding high on economic prosperity our buildings have travelled far too a distance to be efficient again. Those barriers consistently and invariably came up primarily because of our incapability to think simple. This simple fact makes evident that the solution to global warming lies not with our money but with our energy. Classifying intelligent building: Large buildings of yesteryears, the heritage buildings, were build at the opulence of nature that modern buildings with today's stakeholders believe to be effetely snob, and no-longer feasible. Economic prosperity coupled with technological advancement, mandate comfort conditions for the building occupants. Those bring in matching sophistication and thus create intelligent buildings, and increasingly more buildings are coming under this classification, and broadly the following business segments those employ enough sophistication could be tagged as Intelligent Building. " Hotels " Hospitals " Air Ports " Sea Ports " Shopping Malls " District Coolers " Corporate Houses " Military Base Stations " Tele-Communication facilities " Newspaper and Printing Presses " IT-facilities, Data centres, R&D Houses " Refrigeration and large Cold Storage buildings " Commercial Complexes, multi-tenanted buildings Evolving a green building code: As every bird builds its nest; working with nature is the only sustainable way to embrace green energy. Green buildings are spurting out believing that it preserves our holistic ecology. That green Tag is no Rosetta-stone for achieving green energy norm. The fact is those norms are at nascent stage, evolving, and still miles to look forward to. The greenness is all about thrift that needs to be nourished at every sub-system, and those seamlessly intertwined, and scaled up, lead up to its final green delivery code. This proof of greenness must stop somewhere with a building's pulse count. And one way is to look at the building's Specific Energy Consumption (SEC). It's the kWh consumption per annum per square meter of total built-up space. A SEC line of below 200 for a 24/7-operation building is indeed an efficient building. It is very much achievable and that includes process loads like kitchen and laundry for hotels; biomedical equipment and labs for hospitals, data centres, workstations, and communication hubs for Information Technology, R&D centres, corporate houses, and other companies. While going through a process for evolving solution with abstractly myriad subjects, constraints should not be guiding the solution, least it becomes a simplistic solution. Nevertheless, when constraints are built into the solution it could churn out to be truly one universal solution on a global scale. SEC line is a good way to look forward to the greenness of an Intelligent Building. It is unique of a building and simple. SEC line however needs adjustment and in particularly so when the process demand is much on the divergent scale, like a few as noted below. " A non-24/7-operation building would have much lesser SEC and needs suitable adjustment. " Buildings those use multiple forms of input energy like thermal etc., are to be converted into a common kWh equation. " Large concentrated loads like exclusive Data centres, Telecommunication switching centres, POP internet centres etc. those use lesser space and pack higher intensity loads. " District cooling facility that exports large BTU energy and conversely Buildings those import such BTU energy. Exports and/or imports are to be accounted for.