For the room wellbeing it is important to choose a healthy and comfortable system, which can guarantee high performance and reduce energy consumption. Energy consumption theme and the trend of using “low-temperature” devices make radiant systems the most common solution to heat and cool the building with respect for the nature. RDZ heating and cooling system implies the usage of four essential components (radiant system, air handling units, thermoregulation and heat pumps) that, connected together, make it possible to guarantee the room comfort, clean and healthy air and energy saving all year round.