Abstract: A stand alone venting apparatus for an enclosed space that converts open door and closed door emissions of a steam and hot air oven into cooler air and condensate, the apparatus comprising an expansion chamber, a condensing chamber and a chilling chamber. A capture hood is provided for capturing the open door emissions. An emissions inlet is provided for capturing the closed door emissions. The condensing chamber includes condensing tubes with each tube containing an interior and an exterior. The open door emissions are directed over the exterior of the condensing tubes and the closed door emissions are directed within the interior of the condensing tubes. The expansion chamber and chilling chambers work with the condensing chamber to further cool and condense the emissions. All emissions may be re-circulated back into the enclosed space without requiring ductwork to vent outside the enclosed space.

Abstract: A system includes a plurality of capture hoods and a hood supporting unit. Each of the plurality of capture hoods has a hood portion and a connection portion. The connection portion is for connection to the hood supporting unit. The hood supporting unit is capable of connecting to just one of the plurality of capture hoods at a time. The hood portions of the plurality of capture hoods have different shapes. The connection portions of the plurality of capture hoods are identical so any one of the plurality of capture hoods can connect to the hood supporting unit.

Abstract: A system includes an intake, an exhaust, and an adjustable directing member. The intake is for taking in air, the exhaust is for exhausting air, and the adjustable directing member is positioned for directing exhaust air toward the intake. Another aspect is a system that includes a source of polluted air and an air cleaning system. The air cleaning system includes an intake, an exhaust, and a directing member. The intake is for taking in polluted air and the exhaust is for exhausting air. The directing member is for directing air from the exhaust toward the intake to provide an air screen for keeping the polluted air in the vicinity of the intake.