The distinctive and characteristic feature of the internal blocks of channel type high pressure is able to provide air conditioning in several rooms or in a large, by setting necessary for the effective distribution of air airway network and the organization of distribution of air through diffusers, grilles or annemostaty. In addition, the channel systems are flush-mounted systems, and are typically used in areas where critical requirements for the interior and its decoration. Besides excellent ventilation system is replaced. as they have the function of the mixing of fresh air from outside. Duct high-pressure units MDV allow "transporting" air ducts on the long - up to 14 m in height finding distributing devices (grilles) to 7 meters above the floor in the room.