Quote:
Originally Posted by edub370
... or is header wrap unidirectional? i.e. header wrap is designed to keep the headers heat in, whereas we want to keep heat out? ...
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Thermal insulation is "omnidirectional." It impedes the transfer of heat in all directions.
I'm no expert, but it seems to me that a combination of reflective (reject as much as possible) and insulation (slow down any energy not reflected) would work best.