Abstract: An invention of composite, hybrid radiant/forced and natural convection, integrated, sandwiched, multi-role panel (1) optimally integrates heating, cooling, ventilating, air-conditioning, thermo-electric effect, energy recovery, and energy storage functions at very moderate operating temperatures such that it can directly utilize renewable and waste energy resources having very low energy. The composite hybrid panel or building element (1) having a diffuser layer (2) that is thermally conductive, a porous layer (3) providing uniform air diffusion, a thermal insulation layer (4) simply attached or embedded or integrated to a building wall ceiling, floor or stands alone for indoor space partitioning purposes.