On Thu, 04 Oct 2007 14:56:23 -0700, Abe wrote Re
Wok fumes:

It is vented across hi ceiling to the rear of the house where there is
a shared soffit. from there the vent points downward. The fumes are
traveling through the soffit and entering our house.

If it is a shared soffit, could you redirect it maybe up through
the roof etc? Does the vent at any time enter into your property or
any property that could be considered okay for you to modify? It seems
like it would be up to either one of you to redirect the vent
somehow.. if it is indeed coming through your soffit and into your
attic and possible through your ac ducts?

His venting cooking fumes into a shared soffit is illegal. Period.
Tell him he need to construct a proper chimney or you'll complain up
the ladder to building officials.

This is good advice and probably your only recourse other than taking
the guy to court.