This paper puts forth energy quality management as the stepwise process of taking care of the quality of energy better. Energy quality can also be expressed as exergy, which measures the useful work potential of a given amount or flow of energy. Energy quality management is particularly useful to reduce the primary energy use in the built environment. This is achieved by reducing the heating and cooling demand, making use of passive building techniques, exploiting local renewable sources, and utilizing efficiently non-renewable energy. The application of the Rational Exergy Management Model further indicates how the integration of the building in the broader perspective of the community level is crucial to curb the building-related CO2 emissions. The paper concludes that exergy is a vital aspect for low energy and low CO2 emissions architecture.