Abstract: Aspects of the disclosure include methods and systems that use online search trending to inform and dynamically control a determination of which content is displayed on digital display systems. Examples of such content may include, but is not limited to messages, offers, content, tutorials, educational materials, and/or other information. In one example, the displayed content may be tailored based on online activity trending in a specific geographic area.

Abstract: A system for detecting and purging carbon monoxide from a confined space such as a parking garage, includes a plurality of carbon monoxide detectors (A) where each detector provides a detection signal (22) if a threshold level of carbon monoxide is detected. An activation circuit (B) receives the detection signal (22) from one or more of the detectors (A) and provides an exhaust fan activation signal (24). A motor starter (C) receives (1) the exhaust fan activation signal (24), and (2) input power (26) such as 110 VAC or 220 VAC, so that when the exhaust fan activation signal (24) is received from the activation circuit (B), the motor starter (C) provides a switched power output (28). An exhaust fan (D) receives the switched power output (28) from the motor starter (C) so that the exhaust fan (D) operates and thereby purges the carbon monoxide from the space.