Radiant Barrier Savings You Can Expect
The most commonly asked question about radiant barriers is
"How much money can I save on my utility bill if I install a radiant barrier?"
Although RadiantGUARD® radiant barriers BLOCK 95%
of radiant heat, your utility bills savings will vary because there are other
forms of heat flow in a building that contribute to the total cooling (or heating)
load. Data varies by region.
Direct quotes from a
study performed by the Tennessee Valley Authority help to point out the
heat transfer reductions you can expect although heating and cooling
economic savings will vary based
on other types of heat flow and local climatic variations:
"All the radiant barrier configurations tested yielded sizable percent
heat transfer reductions
(ranging from 16 to 40 percent) and statistically significant reductions
in summer attic heat transfer compared to the non-radiant barrier case.
Also, as the ambient temperature increased, the reductions also increased."
"The radiant barrier configurations provides statistically significant
winter attic heat transfer reductions in
many, but not all, situations. The percent
reductions during night hours and during below 35 degree F conditions,
when heating loads are highest, are usually sizable (from 6 to 23 percent)
and the differences between the radiant barrier configurations and the
non-radiant barrier case are often statistically significant during
Note: Note: The above study was
conducted in Chattanooga, Tennessee and references radiant barrier
performance tests when used in conjunction with R-11 and R-19
insulation however, R-30 is the least amount of insulation permissible
under 2006 IECC. R-11 and R-19 are not reasonable baselines in 2009.