Quote:
Originally Posted by Mikesolar
That foil is R 3.5 for over 2" thick. Not too good from where I sit.
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OK,
my bad my link to the conversion tool was incorrect...
Here is the correct link.
I use this conversion too so often that I have downloaded the SWF file to my computer, and book-marked it (local) in my browser.
So, here is how the conversion sequence goes:
R3.5, when reciprocated is 0.2857142857142857 (The U-value in SI inits)
When you look this up in the calculator, using SI units, you will see that the R-value, in units we are accustomed to, is not R3.5 but is actually
R19.8.
My apologies for the bad link, but the correct values are
absolutely worth paying attention to (
and the real reason I posted the entry).
-AC