On 8 Apr 2007 14:41:02 -0700, "dpb" wrote:

On Apr 8, 10:35 am, "marson" wrote:
On Apr 8, 9:38 am, "dpb" wrote:



So you're saying the cold air return "duct" in a two-story dwelling
was the wall cavity between two joists in between an external return
register/angle and short duct on each end?

If so, this violates every building code for fire blocking ...
...

This is common practice where I live (in residential construction) and
is passed by our building inspectors. ...

Really???

The method was discussed here once, probably more than 6 months ago.
I don't remember details.