A work area illuminating and flexible curtain. The curtain has a length and a height and spaced apart rows of lights extending along the length and/or height of the curtain. The spaced apart rows of lights may extend along the length and/or height such that when illuminated, the emitted incident light rays shine generally parallel to a ground or floor surface of the work area. This may allow the emitted light rays to better illuminate the front, rear, side, and/or bottom surfaces of an object in the work area which may be adjacent to and/or at least in part enclosed by the curtain.

Room dividers are provided having an edge at least four feet from a room floor and at least twenty inches from a ceiling, an open or perforated space above and adjacent the edge along at least a majority portion of the room divider, and a moveable shield configured such that fluid from one side of the room divider is substantially blocked from passing through the open/perforated space when the shield is aligned with the space. Curtains are provided which include fastener/s arranged along a screen and strut/s coupled to the fastener/s, wherein the screen extends at least 3 inches above the fastener/s and the strut/s extend at least 24 inches below the fastener/s. Other curtains include struts extending along less than an entire length of the screen but at least between a point approximately level with at least one of the fastener/s to at least 24 inches below the fastener/s.

Room dividers are provided having an edge at least four feet from a room floor and at least twenty inches from a ceiling, an open or perforated space above and adjacent the edge along at least a majority portion of the room divider, and a moveable shield configured such that fluid from one side of the room divider is substantially blocked from passing through the open/perforated space when the shield is aligned with the space. Curtains are provided which include fastener/s arranged along a screen and strut/s coupled to the fastener/s, wherein the screen extends at least 3 inches above the fastener/s and the strut/s extend at least 24 inches below the fastener/s. Other curtains include struts extending along less than an entire length of the screen but at least between a point approximately level with at least one of the fastener/s to at least 24 inches below the fastener/s.

A coupler system for connecting elongate, horizontally disposed rods to vertical supports includes a top-cap component for attaching to the top of a vertical support. The top-cap support includes a body with plural cavities, and at least one ball-cap component for attaching to an end of a rod. The ball-cap component includes a ball region that fits within one of the plural cavities. The body may be formed with four plural cavities, each having beveled edges. The ball-cap component may include a ball region, a neck region, and an angled region located adjacent the neck region and away from the ball region. The top-cap and ball-cap components may include insertion regions with opposing sets of ribs. The coupler system may further include a cover component, and the body may be formed with a central hole for receiving a fastener that secures the cover component to the top-cap component.

A coupler system for connecting elongate, horizontally disposed rods to vertical supports includes a top-cap component for attaching to the top of a vertical support. The top-cap support includes a body with plural cavities, and at least one ball-cap component for attaching to an end of a rod. The ball-cap component includes a ball region that fits within one of the plural cavities. The body may be formed with four plural cavities, each having beveled edges. The ball-cap component may include a ball region, a neck region, and an angled region located adjacent the neck region and away from the ball region. The top-cap and ball-cap components may include insertion regions with opposing sets of ribs. The coupler system may further include a cover component, and the body may be formed with a central hole for receiving a fastener that secures the cover component to the top-cap component.

A system for maintaining thermal separation between first and second adjacent rooms or spaces. The system includes a vestibule with at least a first compartment, and other embodiments may include two or more compartments, such that the vestibule provides a passageway between the first and second rooms. At least one blower draws air from the first room through an air intake, and back into the first room through an exhaust. The system further includes an exhaust port from the first compartment in fluid communication with the exhaust, to exhaust air from the first compartment into the first room. During operation, a vacuum is formed within the first compartment that provides thermal separation between the first and second adjacent rooms.

A coupler comprises a first channel having a first axis of extension in a first horizontal direction and a second channel having a second axis of extension in the first horizontal direction. The second axis of extension is parallel to and spaced apart from the first axis of extension in a second horizontal direction. The second axis of extension has a pitch angle relative to the first axis of extension in a vertical direction, the pitch angle being less than 180 degrees. The first and second channels each include head-mounting features, the head-mounting features constructed and arranged to retain an elongated head to the coupler while permitting movement of the elongated head relative to the coupler in the first horizontal direction.