FLAT DUCT CORNER ELEMENT: A 90o element that can be placed between the start and end points of an air-conditioning system, for joining flat ducts at right angles to each other. The system can be more easily covered/hidden by using air-conditioning ducts with a rectangular cross-section and the corresponding fittings. The equivalent " It has a smaller "thickness" size compared to the elements of a "traditional" circular cross-section pipe system, so it can also be placed in narrow places (e.g. above false ceilings, behind floor beams) without reducing (narrowing) the useful cross-section. The constrictions used in the ventilation system can result in greater pressure loss and higher noise from air flow. If the device to be installed has a connection with a circular cross-section, the so-called to one of the "transformer" adapters, which of course can also be found among the air technology accessories, within all size categories. The strength of Fluxair ventilation fittings is due to the built-in deflector plates, which are the most important element of the system. The optimal design of the baffles enables uniform air flow in the system. The resulting turbulence-free flow results in lower pressure loss and noise level. It is characterized by a higher volume flow and more efficient ventilation/ventilation compared to rectangular ducts of the same size but without baffles, as well as ventilation pipes with an equivalent round cross-section.