Abstract: A mounting assembly for an air barrier. The mounting assembly includes a housing with opposed ends and at least one beam receiving channel in at least one of the opposed ends. More than one fan is disposed in the housing. The fans are adapted to create an air barrier across an opening. Support beams are telescopically received in the beam receiving channels. The support beams are movable between a retracted position and an extended position. The support beams are selectively extendible to meet installation width requirements. A housing support, which may be a mounting bracket or a support rod, is adapted to be mounted to one of a wall or a ceiling and adapted to engage at least one support beam.