inside the car on the driver-side window ledge (both sensors were level to gravity). Radiation
shields for the thermocouples were constructed from cardboard tubing covered with white tape.
A/C vents were directed away from the driver-seat.
Two portable electric heaters were located inside the vehicle. One heater was on the
front passenger seat, while the other was located on the floor directly behind the driver-seat.
Both heaters were positioned so that direct airflow from the heaters’ fans would not hit the
subject.
Figure 5 shows the frame used to apply the IRR treatment. The frame consisted of
wooden boards and two spring rollers (typically used for window shades). Each roller held a 5 x
8 ft. (1.5 x 2.4 m) sheet of the IRR film. The two sheets could be extended independently to
provide single or double IRR treatment (see Figure 6). As Figure 6 illustrates, the frame was
bent at a 90° angle near the top so that no shadow would be cast across the window by the frame,
and so that the film could cover as wide an angle as possible.
Figure 5. IRR treatment frame. The frame allowed one or two sheets of IRR film to be draped
across the driver-side window.