Hi,
Per code, running wire throught duct(cold or warm) is No, no.
Tony

It's difficult to predict what the future will hold. Back in the
sixties, telephones were installed with hard wire screw terminal
blocks on 4 wire (Station D) cable. This was thought sufficient
because nobody would ever want more than two phone lines. Right?

For the present, a category 5e or category 6 installation might be
sufficient, but what about 10 - 15 years from now? The bandwidth for
all the on-demand services a normal household might need might be best
served with a fiber-optic connection.

At the very least, you should run some extra strings in your existing
cable runs to allow future cable (fiber-optics or whatever) to be
pulled and installed without tearing the walls up in the the house.

Nobody in the 50's imagined cable TV. Those of you who are old enough
to know still remember twin-300 ohm cable. Remember how you stripped
the wires to connect to your TV set (with a lighted match to melt the
insulation)

Nobody in the 60's imagined computers in the home, RJ-45 jacks, cat 5
cables, home theatre systems. The very best homes were hardwired
with 2 pair telephone wire jacks (of the 4 prong variety). Modular
connectors did not exist.

The year 2004 doesn't signify the end of technical progress. Just
make sure that you have the cable ducts to be able to handle future
changes.

Beachcomber