An Automatic Fire Protection solution is needed in places that face fire hazards from an undetectable source, which then has the potential to quickly spread. The Tube Suppression System was specifically created to secure small, protected, and critical spaces such as electrical panels, industrial equipment, and computer equipment (e.g. server cabinets) where human intervention may not be readily available. The Tube Suppression System employs heat-sensitive tube technology, designed to protect enclosed spaces. When temperatures or flames reach an appropriate threshold, the tube will rupture, allowing a clean agent (FM200 or Novec 1230) to extinguish the fire before it can spread beyond the enclosed area. This system can effectively contain, identify and eliminate fires automatically, without reliance upon an external power source or human involvement to trigger/fire the extinguishing agent.