Product review (4 stars): Broan 423604 vented hood
Installed the Broan 42000 series Economy vented hood today. I removed a late 80"S Nutone Economy vented hood.  The vertical outlet cutout had to be moved forward approx. 1/2 inches using the new vent as the template, after removing the fan motor and marking the cutout from below through the flange.  The mounting screws actually lined up with the existing holes.  The wiring knockout lined up like the old vent.  I am pleased so far with operation of the new vent and the appearance matches the stainless upgrade to my kitchen.