Energy efficient cooling workshop, New Delhi

The use of energy for space cooling is growing faster than any other end use in buildings, more than tripling over the past three decades. Global sales of air conditioners (ACs) have been growing steadily and significantly: since 1990, annual sales of ACs nearly quadrupled to 135 million units. There are now more than 1.6 billion in use and keeping them running consumes over 2000 TWh of electricity every year, which is two and a half times the total electricity use of Africa.