This is Science Today. If your household energy
bills seem to be running high you may have leaky
air ducts. Mark Modera, a staff scientist at the
Lawrence Berkeley National Laboratory says most
homes in the U.S. have leaky air ducts, causing
about a 20 percent loss of energy. But there are
other reasons - besides wasted energy - to be concerned
about these leaks.
It also winds up sucking in air from places that
you don't necessarily want it from. In some places
like from a crawl space, where you can have radon
be drawn into the house. Other places would be from
the garage, where you're parking your car, warming
up your car, that's also not terribly desirable.
Modera developed an efficient air sealant system,
which can fix leaks from inside the ducts. Using
a computer as a tracking device, this system can
also quickly diagnose leakage problems.
The computer just makes it more accessible. In other
words, to go through a house and within an hour
to an hour and a half, be able to decide OK, these
are things that should be done in this particular
Narrator: For Science Today, I'm Larissa Branin.