A system for mounting a panel within an existing window frame. The system includes an elongated deformable bulb, and an elongated carrier. The bulb has a resilient portion, a base section, an extension extending from the base section, and a crosspiece coupled to a distal end of the extension. The crosspiece includes a pair of shoulders at opposite ends of the crosspiece. Each shoulder protrudes laterally beyond the extension. The elongated carrier has a receiving slot opposite a panel gap. The receiving slot has a neck laterally narrower than an interior cavity of the receiving slot. The receiving slot is configured to securely receive the crosspiece of the bulb and to confine the shoulders of the crosspiece.

Hollow core door apparatus for preventing the build up of pressure in a room includes an inside door skin and an outside door skin, and the door skins include openings through which air flows. A center panel is disposed between and spaced apart from the skins. The center panel has an outer perimeter defined by notches through which air flows. Tabs between the notches are used to secure the center panel to the inside and outside door skins. Air flow from the room is through the opening in the inside skin, around the outer perimeter of the panel, and outwardly from the door and room through the outside skin in a non-linear manner. The door alone with normal undercuts and margins, and with its notches and associated structural elements, achieves a Rater-measured pressure differential of equal to or less than 3 pascals with respect to the main body of the building when bedroom room doors are closed. For larger rooms with air flow greater than one hundred fifty cfm, the pressure is equal to or less than 5 pascals. Air flow is controlled by a plurality of movable panels disposed adjacent to the outer perimeter of the center panel. Sensor elements for sensing desired information and for providing output signals, including signals for actuating the movable panels, are included. The air flow outwardly through the door is at least as great as the air flow into the room, thus the door provides internal transfer of air through the door to eliminate air pressure build up in a room, and at the same time limits light, sight, and sound travel through the door.

A system for mounting a secondary panel within a window frame of an existing window. The system includes a rigid panel, an elongated deformable bulb, and an elongated carrier. The bulb has a resilient portion, a base section, an extension extending from the base section, and a crosspiece coupled to a distal end of the extension. The crosspiece includes a pair of shoulders at opposite ends of the crosspiece. Each shoulder protrudes laterally beyond the extension. The elongated carrier has a receiving slot opposite a panel gap configured to receive an edge of the panel. The receiving slot has a neck laterally narrower than an interior cavity of the receiving slot. The receiving slot is configured to securely receive the crosspiece of the bulb and to confine the shoulders of the crosspiece.

Hollow core door apparatus for preventing the build up of pressure in a room having a register through which air flows into the room and the door includes an inside door skin and an outer door skin, and the door skins includes openings through which air flows into and out of the room and which openings have substantially the same area to provide for a non-linear flow of air through the door to prevent the build up of pressure in the room. An embodiment combining a noxious gas absorbent material with the pressure build up prevention capability is also illustrated.

A door is formed into a folding door by dividing the door into two parts to left and right, that is, a hanging door and a door-end door pivotally supported by the hanging door, and the door-end door is used as the pressure difference mitigating mechanism, and the two doors are integrally operated in a normal time, while if a pressure difference is generated, the door-end door can be first opened in order to reduce an opening force, and the door device with a pressure difference mitigating mechanism with excellent operability is provided. A handle position, a latch position, and a torque are adjusted for a handle for door opening/closing, a door closer, a hinge closer for rotating the door-end door with respect to the hanging door, a latch A of the door-end door to a door frame, and a latch B of the door-end door to the hanging door.

A containment device including a dry curtain, adapted to be deployed for the containment or re-containment of a discharge area, such as an opening, e.g. a door, in response to an explosion. The device includes a ballast bar in the lower portion of the curtain, the ballast bar including cylinders of high-density foam alternated with cylinders of compressible low density foam.

A system for mounting a secondary panel within a window frame of an existing window. The system includes a rigid panel, an elongated deformable bulb, and an elongated carrier. The bulb has a resilient portion, a base section, an extension extending from the base section, and a crosspiece coupled to a distal end of the extension. The crosspiece includes a pair of shoulders at opposite ends of the crosspiece. Each shoulder protrudes laterally beyond the extension. The elongated carrier has a receiving slot opposite a panel gap configured to receive an edge of the panel. The receiving slot has a neck laterally narrower than an interior cavity of the receiving slot. The receiving slot is configured to securely receive the crosspiece of the bulb and to confine the shoulders of the crosspiece.

A door system suitable for installation in data centers to limit airflow to and from aisles between rows of equipment cabinets has a door assembly with a door panel and a plurality of vertically spaced hinge assemblies having powerful permanent magnets manually movable between connected and disconnected positions, enabling the door assembly to be aligned and positioned on the side wall panel of an equipment cabinet and then removably mounted in place by engagement of the magnets. Each magnet can be mounted in a rotatable threaded magnet carriers received in a threaded recesses in the hinge assembly and rotation of the magnet carrier is operable to move the magnet into the connected and disconnected positions. The hinge assemblies also include registration tabs that engage slots in the cabinet for proper alignment and orientation of the door system.

A system for mounting a secondary panel within a window frame of an existing window. The system includes a rigid panel, an elongated deformable bulb, and an elongated carrier. The bulb has a resilient, rounded portion, a base section, an extension extending from the base section, and a crosspiece coupled to a distal end of the extension. The crosspiece includes a pair of shoulders at opposite ends of the crosspiece. Each shoulder extends laterally away from a centerline of the bulb and protrudes laterally beyond the extension. The elongated carrier has a receiving slot opposite a panel gap configured to receive an edge of the panel. The receiving slot has a neck laterally narrower than an interior cavity of the receiving slot. The receiving slot is configured to securely receive the crosspiece of the bulb and to confine the shoulders of the crosspiece.

A closing body allows closing and opening an access opening or a passage of a room in case of a pressure difference between an interior and exterior of the room. A closing fitting set and a door leaf are disclosed, by means of which closing fitting set and door leaf a closing body can be formed. The closing body is in the form of a pivotable door, a pivotable window or a pivotable flap. A valve device is provided on the closing body, which valve device effects a temporary pressure equalization during the opening or closing of the closing body. The valve device is in the form of a valve flap, and a release mechanism is provided, which opens the valve device. A locking fitting is provided for the closing body, and the release mechanism is coupled, for actuation, to the locking fitting of the closing body.