Denso of Japan recently came up with a superior air-conditioning system for hybrid buses, thanks to the use of an integrated electric compressor which consumes around 50% less juice when compared to Denso’s previous system. This in turn results in improved operating efficiency without sacrificing passengers’ comfort levels. Since it works on a different principle when compared to engine-powered compressors, there are no engine belts to worry about as an electric compressor can be precisely controlled according to the situation. It will hold the distinction of being the first mass-produced, electric air-conditioning system integrating an electric compressor with a built-in inverter in Japan. To make things more comfortable, the new air-conditioning system works even when the bus’ engine hasn’t started.