Abstract: An industrial air exhaust hood for the collection and filtering of air that is to be exhausted through ductwork. The inventive exhaust hood apparatus may be installed within a building in an installation process that does not require the creation and use of a factory customized exhaust hood configured for the specific ductwork within the building for which it is to be installed. The exhaust hood contains a hood enclosure free of obstructive structures which thereby allows for the cutting and welding of the hood enclosure to the ductwork, whereupon filter retention devices and filters are installed. The result is an exhaust hood apparatus that can be installed on-site in a single process without the need of drawings and hood customization.

Abstract: The apparatus is adapted to provide for the controlling of incoming replacement or make up air in a cooking equipment ventilation system. The apparatus is dependent upon an air plenum surrounding the hood or an enclosure which contains the incoming, unconditioned make up air. The air is discharged into the cooking primarily by adjustable air controllers. The controllers are located at the lower lateral edge of the hood. The direction of the incoming replacement or make up air can be directed as desired for the required thermal conditions. The apparatus can be an integral part of a new ventilation hood assembly or system, or can be retrofit to a ventilation hood assembly or system already in operation.