... vibration 2. Round air outlet connected with flexible pipe 6'8"Bathroom Exhaust fan/ventilation fan 1. Low noise, little ... vibration 2. Round air outlet connected with flexible pipe 6'8"Bathroom Exhaust fan/ventilation fan1. Low noise, little vibration 2 ... , nice looking, long life2. Installed in all kinds of non-windows ceiling. for conference rooms, restaurant, receptionroom, bathroom etc3. Exhaust ...