Round NCD supply air diffusers are for low and medium pressure ventilation installations as well as supply-exhaust air conditioning systems. You can with constant and variable air flow. The air can be vented horizontally or vertically at a temperature lower or higher than room temperature. The supply air diffusers are characterized by their low weight and easy installation. Mounting in air connections possible. Thanks to the use of PRO air connections, an even flow of air and sound insulation are achieved when using an appropriate silencer