The OPTIMA FULL COVER series of ducts with lid, fully enveloping and with flush wall closure, is designed with the aim of optimising the internal spaces to facilitate and speed up the installation of the refrigeration lines, the electrical cable and the condensate drain with the possibility of inserting the mini Easy Flow 7 - 11 - 15 - 20 lt pump inside the duct (only with the TB 75 - T 75 series).