Abstract: A fume hood control system includes a fume food. The fume hood includes a first baffle, a sash and a hood enclosure positioned within an environment. The hood enclosure includes a plurality of sidewalls forming a work chamber, a first aperture configured to permit an airflow between the environment and the work chamber, and a second aperture configured to permit the airflow between the work chamber. The sash is configured to at least partially cover the first aperture. The first baffle is configured to direct a path of the airflow within the work chamber. The first baffle is transitionable between a first number of positions. The fume hood control system includes a controller configured to determine, via a sash sensor, a current position of the sash. The controller is further configured to determine, via a baffle position sensor, a current position of the first baffle.

Abstract: A fume hood control system includes a fume hood. The fume hood includes a sash, an exhaust valve, and a hood enclosure positioned within an environment. The exhaust valve is transitionable between a number of positions. The fume hood control system includes a controller. The controller is configured to determine a differential pressure measurement, determine a current position of the exhaust valve, determine a position of the sash, and control the operation of the exhaust valve to selectively transition between the current position of the exhaust valve and an updated position of the exhaust valve based on at least one of: (1) a difference between a setpoint differential pressure value and the differential pressure measurement and (2) the position of the sash.

Abstract: An air damper assembly for an air duct having an interior wall and an exterior wall is provided. The air damper assembly includes a damper plate having a periphery and multiple teeth spaced at least partially around and extending from the periphery. The multiple teeth vary in length from a maximum to a minimum over a span of approximately 90 degrees around the periphery. The air damper assembly further includes an axle assembly fixedly coupled to the damper plate and rotatably coupled to the air duct. Rotation of the axle assembly causes the damper plate to rotate within the air duct between a fully open position and a fully closed position to increase or decrease a flow of fluid through the air duct.

Abstract: An air damper assembly for an air duct having an interior wall and an exterior wall is provided. The air damper assembly includes a damper plate having a periphery and multiple teeth spaced at least partially around and extending from the periphery. The multiple teeth vary in length from a maximum to a minimum over a span of approximately 90 degrees around the periphery. The air damper assembly further includes an axle assembly fixedly coupled to the damper plate and rotatably coupled to the air duct. Rotation of the axle assembly causes the damper plate to rotate within the air duct between a fully open position and a fully closed position to increase or decrease a flow of fluid through the air duct.

Abstract: An air duct includes a shell, a first annular chamber defined along a circumference of the sidewall and fluidly coupled with an inner volume defined by the shell through multiple first openings, a second annular chamber defined along the circumference of the shell at a longitudinal position downstream of the first annular chamber, and fluidly coupled with the inner volume of the shell through multiple second openings, a first pressure sensing coupler, a second pressure sensing coupler, a first field accessible coupler, and a second field accessible coupler. The first pressure sensing coupler is fluidly coupled with the first annular chamber and the second pressure sensing coupler is fluidly coupled with the second annular chamber for pressure detection. The first and second field accessible couplers are fluidly coupled with the first and second annular chambers for providing pressurized air to the first annular chamber and the second annular chamber.

Abstract: A flow control member includes a body portion configured to be coupled to a damper plate and a plurality of projections extending from a periphery of the body portion. The plurality of projections defining an flow space between adjacent projections. The plurality of projections vary in size along the periphery of the body portion.

Abstract: An air damper assembly for an air duct having an interior wall and an exterior wall is provided. The air damper assembly includes a damper plate having a periphery and multiple teeth spaced at least partially around and extending from the periphery. The multiple teeth vary in length from a maximum to a minimum over a span of approximately 90 degrees around the periphery. The air damper assembly further includes an axle assembly fixedly coupled to the damper plate and rotatably coupled to the air duct. Rotation of the axle assembly causes the damper plate to rotate within the air duct between a fully open position and a fully closed position to increase or decrease a flow of fluid through the air duct.