2014, 138WB, High Roof, Gas, SW MT
Your initial results:
Ambient: 24° (Colder than I expected)
Van Interior: 68° (Warmer than I expected)
Quilt Alone: 62° inside surface, 61.5° outside surface
Quilt with white light-blocking fabric: 64.5° inside surface, 51° outside surface
Quilt with thin reflective fabric: 64° inside surface, 40.5° outside surface
The progression seems right for the different treatments, but could you get one more set of readings?
Its interesting to have the temp of the outside surface of the shade. I guess you are getting that by quickly pulling the shade in and getting a reading on the back? It should be helpful to have these as it will show how much of the temp drop is over the shade itself.
I'm a bit puzzled by the big drop in temperature of the outside surface for the last one (40.5F).
It would be good if both the front and back of shade had the painters tape where you take the reading - this will keep the IR gun from getting confused by the reflective surface.
Can you also get a reading on an adjacent window with no shade? Just put some painters tape right on the inside of the glass. This can then be the baseline for all the window treatments.
Since the inside temperature probably varies around the van, best to get the inside air temp with a thermometer placed a few inches in front of the window you are getting the shade measurements on.
Are the different shade constructions all being measured on the same window? That is, measure quilt alone, then add light blocking fabric and measure again? If so, good to allow some times for things to stabilize.