INDEPENDENT TEST OF HEAT SHIELD MARINE INSULATION
NOTE
Tests were conducted using a 7.5 cu. ft. box , 23 sq. ft. surface area, with 3 inch of urethane foam on the external surface.
15 lb. of ice were loaded into the box, this is a latent heat potential of 2160 BTU. (Latent heat is the heat required to melt 15 lb. of ice.)
Ambient temperature was maintained in a 4’ x 8’ x 9’ chamber with a thermostat controlled space heater. temp varied between 80 and 90 degrees.
The first test was conducted with a standard box insulated with 3 inches of foam. The second test was conducted after applying 1/2 inch heat shield liner to the outside of the three inches of foam on the standard box.
Test Results
Test 1. the Ice reached 40 degrees F. after 35 hours. R value =1/(Btu/(hr. x sq. ft. x delta T) = R - 16
Test 2. the ice reached 40 degrees F. after 56 hours. , using the same formula = R-29.
This improved the performance of the box by a 60% increase in insulation value.
Note that extended results are achieved using the super 1" Heat Shield insulation. You can now run a 7-8 cu. ft. 12 volt refrigerator at stable temperatures below 46 degrees in tropic conditions on less than 40 AH per day.