The OPTIMA FULL COVER ECO series of ducts with lid, fully enclosing and with flush wall closure, is designed to optimise 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).