Hold-down clip for a suspended ceiling system in a cleanroom

A suspended ceiling system for maintaining environmental stability of an enclosure the ceiling system comprising:

• perimeter angle molding having at least one flange projecting outward from the perimeter angle molding,
• a panel, and
• a hold down clip attached to the perimeter angle molding and adapted to exert a springing force onto the panel thereby holding the panel against the flange, the hold down clip comprising:
• an engagement section including:
• a top edge, a first engagement side edge defining at least a portion of an outer edge of a first tine terminating at a first point, the first engagement side edge projecting downward from the top edge, a second engagement side edge defining at least a portion of an outer edge of a second tine terminating at a second point, the second engagement side edge projecting downward from the top edge, and a louver element located between the first tine and the second tine, the louver element including a first louver end connected to the perimeter engagement section, a first bend, and a terminal louver end opposite the first end;
• an extension section projecting outward at a substantially perpendicular angle from the perimeter engagement section at the top edge, the extension section including a first extension side edge and opposite second extension side edge with an extension aperture located between the first extension side edge and the second extension side edge;
• and
• a tongue section projecting downward from the extension section at a bend line having a first tongue side edge and opposite second tongue side edge, the tongue section including a curled section wherein a portion of the curled section projects below the first louver end,
• wherein the hold down clip is made of an elastic material.