The exterior walls of the test room, facing the North and the East, were instrumented using heat flux sensors, air temperature sensors, and thermocouples. Each exterior wall was instrumented with thermocouples on the inside and outside surfaces and three heat flux sensors on the inside surface. In addition, air temperature sensors were also installed on the inside and outside sides of the walls. The locations for placement of heat flux sensors were determined using an infrared thermographic camera to avoid the areas with thermal leakage. The air temperature inside the room was controlled by installing a split type air-conditioner. The set point of the air-conditioner was 22 ◦C.