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Radiant Barrier Performance during the Heating Season
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Results of winter experiments conducted in Central Texas are presented. The experiments were side-by-side tests using two identical 144 ft2 houses which responded similarly to weather variations prior to any retrofits. Two radiant barrier orientations were tested, horizontal barrier and barrier against the rafters, in vented and non-vented attics. The results compiled in this paper are for attics with R-19 fiberglass insulation. The data showed that radiant barriers were still effective during the winter season. During a typical day radiant barriers prevented approximately 9-17 percent of the indoor heat from escaping into the attic. No significant difference in moisture accumulation was detected in the attic with the radiant barrier.
Medina, M. A.; O'Neal, D. L.; Turner, W. D. (1992). Radiant Barrier Performance during the Heating Season. Energy Systems Laboratory (http://esl.eslwin.tamu.edu). Available electronically from