Concealed air vents

A fluid distribution system, comprising:

• a passageway;
• a plenum adapted to selectively allow said fluid to move into the passageway;
• and
• a controller operably connected to the plenum;
• a mounting surface defining an opening in fluid communication with the passageway;
• and
• a moldline structure unit, comprising a base member secured to the mounting surface, a guide member secured to the mounting surface and having first and second opposing faces, the guide member defining a channel extending between the first and second opposing faces, at least one flexible rod having first and second ends, the first end being fixedly attached to the base member and the second end being disposed in the channel and being capable of slideable movement within the channel, a panel disposed around the rod and between the base and guide members, the panel being larger than the opening, and an actuator adapted to induce deformation of the rod;
• wherein deformation of the rod causes the panel to move between a first position in which the panel sealably closes the opening and a second position in which the panel is moved away from the opening, thereby allowing said fluid to exit the passageway via the opening.