F-Factor for uninsulated heated slab?

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Somebody done goofed and installed a heated concrete slab with no perimeter insulation. We are looking at options to increase the insulation around the slab, but in order to make the comparison we need to get existing conditions of the slab. Does anybody have any idea what this would be or how to calculate it?

akingsbury's picture
Joined: 2012-06-11
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