Quote:
Originally Posted by ctgottapee
...Horizontal heat reflectiveness isn't near that of the vertical...
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I think that if you look into this, you will find that radiant energy travels equally in all directions, and the ability to reflect radiant energy is equal in all directions as well.
However, if the convective effects of air movement are considered, then the "R-value" will be different with different orientations.
-AC