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Under radiant floor heating & proper insulation

Posted by Robert Wadsworth on February 10th, 2000 06:38 AM
In reply to oops - sorry by MARK IN NH on August 11th, 1999 11:45 AM [Go to top of thread]

Sorry, but J Jay's got it wrong. Reflective insulation
properly installed is an excellent choice for radiant
heating. The "cool air theory" doesn't incorporate
the basic concept of heating with radiant units -- that
heat transfers across air spaces by radiation, and does
not heat the air space. The aluminum foil surfaces
reflect 97% of that radiated heat back to its source.
If, over time, the air space gains some heat and the
insulation is properly installed, it will not "leak"
out of the cavity.

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