Air-conditioning system energy efficient retrofitting of a commercial building

In the energy efficient retrofitting of existing buildings, the HVAC engineers should meet more special demands for energy saving. With an air-conditioning system retrofitting project, describes the project from research, testing, analysis, design, implementation, verification of energy saving and other key aspects, analyses the energy-saving effect, and summarizes the differences of air conditioning system design between retrofitting projects of existing buildings and newly-built buildings.