Water supply pipes and drain pipes running through return air ducts?

[aharper1]

Is that alright?, I know dryer vents are not supposed to

[phinsperger]

Condensation or leaks from pipes can cause not only rusting of metal ducts but also mould growth which is most undesirable esp. in a duct system.

Paul Hinsperger
Hinsperger Inspection Services
Orangeville Ontario
www.hinsperger.com

[Larry D. Kage]

Aaron, Paul's right about the condensation, leaks, rust and mold potential.

Here is some more info:

http://www.nachi.org/forum/f20/ducting-7029/

[Andy T. Bishop]

What about people sneaking electrical wiring up and through duct work?
Thanks