Abstract: The present invention provides an alarm system capable of monitoring and controlling access to a controlled area using a central controller and access keys each having specified permissions. The system is operable to record images or video of the access entrance areas, utilize sensors for detecting tampering with the hardware of the system; sound alarms when the rules of the alarm system are violated; send alerts to management and other authorized personnel when the rules of the alarm system are violated; and log and correlate data regarding the use of the access keys and images/video taken with the dates and times, and the identities of the access key holders to deter any misuse of the alarm system.

Abstract: A security vent includes a housing, a drawer and a latch. The housing includes first and second ends defining a passageway in which the drawers receive. The drawer includes a filter receiving slot. The drawer is movable in and out of the passageway to provide access to the filter receiving slot such that a filter can be inserted and removed therefrom. The latch assembly allows the drawer to be locked in a closed position and unlocked for opening. In another embodiment of the invention, a security vent mountable to the existing air duct inlet opening includes a housing assembly having a mounting frame and a housing wall secured to the mounting frame. The housing wall includes a front faced space from the mounting frame. The front face is perforated. The housing wall and mounting frame define a filter receiving region for holding an air filter.