Thread: Surviving high heating oil prices
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krw[_3_] krw[_3_] is offline
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Default Surviving high heating oil prices
In article ,
says...
Sat, 12 Jul 2008 09:32:50 -0400 from krw :
In article ,
says...
With an air gap, the foil adds a real R-value.

Nonsense. The air gap adds R-value. The foil adds nothing to the
heat conduction. Foils is METAL, which is a CONDUCTOR.

Is it possible that it adds indirectly, by serving as a vapor barrier
so that the outward space stays drier and this is a better insulator?

If you read back, I said that foild will help by REFLECTING radiated
heat. It doesn't do squat for the 'R' value, however, because that
is a measure of CONDUCTED heat.


--
Keith
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