By Ivano Piubellini, Discipline Leader–Property & Buildings

The key reason for this is that like any heat transfer device, an air-cooled air conditioning unit requires a temperature differential  between the ambient air and the heat transfer medium, the refrigerant gas. During air conditioning cooling mode operation, the larger the differential between the hot refrigerant gas and the ambient air temperature, the easier it is to transfer the waste heat, extracted from the building interior, to the outside air.

With climate research indicating that temperatures are gradually rising on average and the frequency of days with above average temperatures increasing, this is a significant issue. To read more, click here