With endless development in the world, demand for more energy production has driven the aggravation of pollution and global warming. Scientists predict that if present trend goes on, the earth will be inhabitable in very near future.

Governments and NGOs around the globe is gearing up the effort for greater energy conservation. The aim is to save the world for our children.

Many large densely populated cities are located in Asia. They are packed with large multi-storey commercial buildings, mega 50% - 70% of total energy consumption is taken up by centralized air-conditioning systems.

Increase the efficiency of these systems would not only means lowering the operating cost but also effectively lowering CO2 emissions and achieve better earth conservation.