On Apr 8, 11:54*pm, Molly Brown wrote:
In the houses from the early part of the last century the kitchens
have a chimney in the ceiling for ventilation. It is a simple four
cornered five inch deep indentation. I’m sure most of you have seen
them at one time or another. A while back a company was selling
retrofit electric exhaust fans. It was a square flat piece of steel
with a fan and grid in the middle that mounted on the opening and
connected to electrical lines that you had to run in the attic. Does
anyone know if anyone still makes these retrofit exhaust fans or who
the company is or was that made them?

I beleive I have seen what you're descrbing

I think of it as more of a "formed ceiling cooking hood", the slopes &
indentation wind up in a hole in the ceiling that goes up through the
attic (via a vent duct) and out through the roof.

Do you have to have this particular fan or are oyu just looking for
powered ventilation?

I'd put an exhaust fan in the attic attached to the "hood" & vented to
the outside.

The house I saw this thing in was a ~1920's house in SoCal.

cheers
Bob