The Lo-Carbon Silent Fan Range not only delivers stylish and silent ventilation without compromise on performance, but now coes with even more features and more model options providing flexibility when choosing the right fan. Open or Closed Grille Options From only 12 dB(A) High efficiency long life motor rated up to 40,000 hours run time 5 Year warranty IPX5 - Zone 1 rated Meets current Building Regulations Approved Document F and L Extra long duct run? Variable speed adjustment at installation allows you to get the airflow you need Intermittent and Continious running options Back draught shutters included Suitable for wall, ceiling, window and panel mounting