The RTD labelled "Ambient" is located about an inch away from the box in
the air. 

The RTD labelled "Outside Skin" is taped to the top surface of the box.

The RTD labelled "Inside Skin" is taped to one of the internal sides of
the box. 

The RTD labelled "Inside Air" is located about an inch behind the fan
that is taped to the top center of the box. 

About an inch in front of the internal fan there is a 12 Ohm resistor.

The inside has no foil while the outside is covered in foil.  

An external fan was blowing at the box during the experiment.