Valves air louver (hereinafter KVZH) are devices used to control air flows that participate in the distribution of air flows in ventilation and air conditioning (fence, release, recycling, etc.). Technical parameters KVZH: 1) working environment temperature: -40 Cº to +70 Cº; 2) operation at differential pressures up to 1800 PA without deformation of the valves with their length of 1 meter; 3) the maximum air velocity 15 m/sec. The size range possible in length and in height from 100 mm to 2400 mm with step of 100 mm. The dampers are made of anodized aluminium profile in the following versions: - with the drive or without it; - with insulation or without it; with antifreeze or without it. Air valves can be manufactured in the following executions: - single - dual or paired, - insulated with highly efficient energy saving system anti-freezing and non - with temperature controller and without it.