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 secure delivery door kit includes a door assembly, a first type of attachment mechanism, and a second type of attachment mechanism. The door assembly is configured for being installed by a user in a desired installation location (such as a wall or a garage door) and the user selects which type of attachment mechanism to use, depending on the type of installation location the user chooses. The door assembly includes a door operatively coupled to a frame such that the door is configured to move relative to the frame between an open position and a closed position. The door assembly is configured for being installed in the installation location and used for secure package delivery. The attachment mechanisms are configured for attaching the door assembly to the installation location, and the second type of attachment mechanism is different from the first type of attachment mechanism.

A Garage door with a secure door assembly including a garage door with a horizontally extending panel having a framework including parallel spaced apart horizontal members extending along a top edge and a bottom edge thereof and a secure package door assembly carried by the horizontally extending panel. The secure package door including an outer portion and an inner portion coupled together with the parallel spaced apart horizontal members captured therebetween. A door coupled by hinges to the outer portion and moveable between an open position and a closed position, A locking mechanism is included for locking the door in the closed position.

A secure delivery door kit includes a door assembly, a first type of attachment mechanism, and a second type of attachment mechanism. The door assembly is configured for being installed by a user in a desired installation location (such as a wall or a garage door) and the user selects which type of attachment mechanism to use, depending on the type of installation location the user chooses. The door assembly includes a door operatively coupled to a frame such that the door is configured to move relative to the frame between an open position and a closed position. The door assembly is configured for being installed in the installation location and used for secure package delivery. The attachment mechanisms are configured for attaching the door assembly to the installation location, and the second type of attachment mechanism is different from the first type of attachment mechanism.