Patent under preparation In most of the places, except the coastal areas, the night temperatures and the wet bulb temperature are in the range of human comfort. By an ingenious combination of electronics, temperature sensors, and controlled humidification, the need for air conditioners can be reduced or virtually eliminated in many parts of the country. These come between the air-conditioners and desert coolers. Once completely developed, they can be used along with airconditioners, and reduce the total energy requirement by as much as 80%.