Where air distribution ducts are present, their monitoring is essential to ensure code‑compliant installation. International standards acknowledge that duct systems can act as a channel for smoke, toxic gases, or flames, allowing them to propagate between areas and significantly increasing the risk of incidents, panic, and property damage. One of the main purposes of these measures is to reduce the spread of smoke through recirculation. Achieving this requires a reliable detection system capable of initiating an immediate response by stopping fans and closing fire dampers. Inim offers all the components needed to meet these requirements.