Heating panel, classical, high quality with UDIM tiles, each rib from the panel is on its own UDIM patch, highly realistic model, scaled in world dimensions, ready for animation or VR, just smooth the mesh once for VR, sanity checked, I have spent lot of time on this, its real time saver whoever wants to model this boring piece of architectural essential. One rib is made out of single mesh, watertight, to add realism.