Abstract: Pipe installation fitting for sealing around a pipe or conduit where it passes through the roof or outside wall of an enclosed structure. Conduits pass substantially vertically through the base panel of the hood, make a right angle bend, then pass through a vertically disposed panel. More than one pipe or other protruding structure may be installed in a single flashing hood.The flashing hood of the present invention is easy to use, can be quickly installed, provides thermal, vibration, and moisture insulation, and can be reopened at any time for servicing, replacing, or adding to conduits passing through it.

Abstract: An exhaust hood for kitchens, spray booths, etc., is provided with an air intake plenum having a nozzle spout which is adjustable to inject air from the plenum into the hood on selectively different injection paths. The nozzle spout desirably has an adjustable lip which is perforated. The spout turns on a bearing for adjustment purposes and there are flexible seals between the plenum and the nozzle spout.