radiant panel heating and cooling systems. It is a patented modular manifold complete with flow rate displays with a graduated scale, with a total shut-off function on the flow module; each individual return module is equipped with a thermostatable insert. The new range of 'Hight sensibility' flow meters allows a perfect combination with the latest generation of variable circulators. On request it can be supplied with a special insulation shell. Water distribution in the various circuits can be carried out via plastic, multilayer or copper pipes up to a diameter of 20 mm. The low pressure drops, a characteristic due to the special design of the flow and return modules, allow any adduction to the heating circuits without any resonance.