An apparatus, comprising: a housing defining a top surface, a bottom surface, and first and second side surfaces connected the top surface and the bottom surface and defining a first plenum chamber between the top, bottom and first and second side surfaces; a first rail extending from the first side surface and a second rail extending from the second side surface such that when the first and second rails are slidably engaged with a third surface that is in parallel disposition to the bottom surface, the first and second rails, the bottom surface and the third surface define a second plenum chamber; wherein: a first end of the housing defines a first plenum outlet for the first plenum chamber on a first side of a blower device that includes a blower fan, wherein the first plenum chamber is further defined by a second end that extends at least to and connected to edges of the top surface, the bottom surface, and the first and the second side surfaces, the second end being positioned longitudinally on a second side of the blower device; the top surface defines a plenum inlet that is aligned with the blower fan so that the plenum inlet is over at least a portion of the blower fan; the bottom surface defines a second plenum outlet that is positioned on the second side of the blower device that is opposite the first side of the blower device and that fluidly couples the first plenum chamber to the second plenum chamber formed by first and second rails, the bottom surface and the third surface; and the second plenum chamber formed by the first and second rails, the bottom surface and the third surface has a third plenum outlet. a housing defining a top surface, a bottom surface, and first and second side surfaces connected the top surface and the bottom surface and defining a first plenum chamber between the top, bottom and first and second side surfaces; a first rail extending from the first side surface and a second rail extending from the second side surface such that when the first and second rails are slidably engaged with a third surface that is in parallel disposition to the bottom surface, the first and second rails, the bottom surface and the third surface define a second plenum chamber; wherein: a first end of the housing defines a first plenum outlet for the first plenum chamber on a first side of a blower device that includes a blower fan, wherein the first plenum chamber is further defined by a second end that extends at least to and connected to edges of the top surface, the bottom surface, and the first and the second side surfaces, the second end being positioned longitudinally on a second side of the blower device; the top surface defines a plenum inlet that is aligned with the blower fan so that the plenum inlet is over at least a portion of the blower fan; the bottom surface defines a second plenum outlet that is positioned on the second side of the blower device that is opposite the first side of the blower device and that fluidly couples the first plenum chamber to the second plenum chamber formed by first and second rails, the bottom surface and the third surface; and the second plenum chamber formed by the first and second rails, the bottom surface and the third surface has a third plenum outlet. a first end of the housing defines a first plenum outlet for the first plenum chamber on a first side of a blower device that includes a blower fan, wherein the first plenum chamber is further defined by a second end that extends at least to and connected to edges of the top surface, the bottom surface, and the first and the second side surfaces, the second end being positioned longitudinally on a second side of the blower device; the top surface defines a plenum inlet that is aligned with the blower fan so that the plenum inlet is over at least a portion of the blower fan; the bottom surface defines a second plenum outlet that is positioned on the second side of the blower device that is opposite the first side of the blower device and that fluidly couples the first plenum chamber to the second plenum chamber formed by first and second rails, the bottom surface and the third surface; and the second plenum chamber formed by the first and second rails, the bottom surface and the third surface has a third plenum outlet.