VMC double flow, functioning with new air or heat recovered on extracted air. Tight cast solid power station equipped with ventilators two speeds for blowing and extraction of air (thermodynamic modules). Two motorized modules of regulation, self-adjustable mouths of extractions, mouths of blowing with connection in plenum. Order electronic mural skeletal. Connected together by conduits of circulation and conduit of recycling. For house and multifamily apartments.