With ceramic accumulator blocks of high thermal inertia with armoured resistors inside to keep the heat for longer. They absorb convection heat and radiate it through their aluminium front panel.
Radiator with top opening to evenly dissipate all the heat generated by natural convection and radiation.
Cold rear side. It directs all the heat by convection and frontal radiation, protecting the wall where it is installed from high temperatures, avoiding unnecessary energy consumption.