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 outside door skin, and the door skins includes openings through which air flows and a center panel between the skins and spaced part from the skins. The center panel has an outer perimeter greater than the inner perimeter of the openings. The center panel is spaced apart from the skins, and also from the adjacent stiles and rails. A chamber is formed about the panel and between the adjacent stiles and rails and the openings in the skins. Air flow from the room is through the opening in the inside skin into the chamber, around the outer periphery of the panel, and outwardly through the opening in the outside skin in a non-linear manner.

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 and panels disposed in the openings to define the amount of air flowing through the openings in the skins. The door also includes at least a single fixed panel and a movable panel, both of which panels include openings through which air flows when the openings in the panels are aligned and which air flow is restricted when the openings are misaligned. The inside and outside panels have peripheral openings defined between the openings in the skins and the panels disposed in the openings and which peripheral openings define areas at least as great as the area of the openings in the fixed and movable panels, and the openings in the fixed and movable panels are offset from the peripheral openings to provide for a non-linear flow of air through the door to prevent the build up of pressure in the room and to restrict the non-linear air flow through the door when the openings in the fixed and movable panels are misaligned. An embodiment combining a noxious gas absorbent material with the pressure build up prevention capability is also illustrated.

Certain aspects of the present disclosure provide movable barrier, including: a frame having a first side and a second side parallel to the first side; a first exterior panel connected to the first side of the frame and including: a first non-planar profile; and a first plurality of perforations; a second exterior panel connected to the second side of the frame and including: a second non-planar profile; and a second plurality of perforations; a cavity defined between the first exterior panel and the second exterior panel; and a liner disposed within the cavity and configured to: deform when an air pressure differential acting on a first side of the liner exceeds a pressure differential threshold and allow increased airflow through the movable barrier.

Certain aspects of the present disclosure provide movable barrier, including: a frame having a first side and a second side parallel to the first side; a first exterior panel connected to the first side of the frame and including: a first non-planar profile; and a first plurality of perforations; a second exterior panel connected to the second side of the frame and including: a second non-planar profile; and a second plurality of perforations; a cavity defined between the first exterior panel and the second exterior panel; and a liner disposed within the cavity and configured to: deform when an air pressure differential acting on a first side of the liner exceeds a pressure differential threshold and allow increased airflow through the movable barrier.

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.

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 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. 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.

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. Air flow is controlled by a plurality of movable panels disposed adjacent to the outer perimeter of the center panel. Sensor elements for detecting aspects of the indoor environment and for providing output signals, including signals for actuating the movable panels, are included. A method of making the door follows the structural elements defined above.

Doors having stile and rail frames and center elements secured to the stile and rail frames and the center elements have margins inwardly where the center elements and the door frames overlap and openings extend through the margins outwardly from openings in skins, and inside and outside skins are secured to the stile and rail frames. The inside and outside skins have openings adjacent to and laterally or inwardly spaced apart from the openings through the margins whereby air flows through the openings in the inside skin, through the openings in the margins, and through the openings in the outside skin in a non-linear manner to prevent pressure build up in rooms to comply with the Department of Energy maximum recommended room pressure of three pascals or less.

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.