Ventilation Device, In Particular For Heating, Cooling, and/or Humidifying Air In Residential Buildings

A ventilation device for residential buildings, comprising

• a duct-shaped housing (1) having an air inlet opening (2) and an air outlet opening (3) and a fan impeller (6) driven by an electric motor (4) arranged in the housing (1), as well as a filter unit, and at least one of a heat exchange unit a heating coil unit (14) arranged in a main flow direction (Z) of an air flow generated by the fan impeller (6) from the air inlet opening (2) toward the air outlet opening (3),
• wherein the electric motor (4) is configured as a permanently excited electronically commutated synchronous motor, and the fan impeller (6) as a single flow, free running diagonal impeller or single flow, free running radial impeller with blades (9) bent backward relative to a direction of movement of the impeller, an air guiding device (17) being arranged in the main flow direction (Z) of the air flow in front of a suction nozzle (16, 108), the air guiding device (17) being configured as a flow conditioner, comprising a bar structure (112) composed of air guiding bars (114) to be fastened on the suction side in front of a flow inlet opening (15, 110) with a central longitudinal axis (X-X) of the fan arrangement (100), which encloses the flow inlet opening (15, 110) such that a guide inlet opening (116) is configured on the suction side at an axial height (H) in front of the flow inlet opening (15, 110) of the bar structure (112) whose opening surface is smaller than the flow inlet opening (15, 110), the bar structure being formed by a grid structure (112) consisting of intersecting grid bars (114, 115) having a plurality of grid openings (115a) enclosed by the grid bars (114, 115), the grid bars (114, 115) of the grid structure (112) having a height (Hf) and thickness (Tf) holding Hf/Tf>5 and the grid openings (115a) having a radial width (L) and a peripheral grid width Lu, holding:
• ⅓<Lu/Lr<3.