HLU stand with an open plastic ventilation unit lit in redHLU Hürner Luft- und Umwelttechnik stand with a transparent lit fanTransparent illuminated fan and Ex-marked black plastic fan on the HLU standHLU plastic air handling units with open doors and brochureVisitors in conversation at the HLU stand near a small plastic fanPlastic fans on wooden plinths at the HLU standConversation at the HLU stand beside QR codes and an employee screenHLU black plastic fan with Ex marking and grey centrifugal fanTransparent centrifugal fan model lit with blue LEDs at the HLU standHLU stand with plastic air handling units and chemical-resistance wallHLU transparent fan model with blue motor and drive controllerHLU plastic air handling unit sections with open doors and damper actuator