Ventilation Fans 0 Reviews Combined fans/silencer units for general, tunnel and shaft ventilation. SUBMIT ENQUIRY Submit SEE MORE Ventilation Systems Features Sizes Reviews (0) Robust Combined fan and silencer unit Ideal for tunnels and shaft ventilation 500mm to 1400mm Add New CommentReply CommentNameEmailComments HtmlPreview b i u quote Notify me when new comments are added Enter the code shown above in the box below Save Comment