ICON Air panel system. Icon Air is specifically designed for environments using an underfloor HVAC (heating, ventilation, and air conditioning) system.This system incorporates the use of a clip on air tight stringer which creates a seal in between the panels to control and minimize air leakage. With the stringer seal, the underfloor cavity then converts into an air plenum. ICON Air brochure ICON Air panel system 4.5KN (1000lbs) 4.5kn specification sheet 6.0KN (1250lbs) 6.0kn specification sheet 9.0KN (2000lb) 9.0kn specification sheet