Max operating temp of motor is 130℃ / 266℉; Max ambient temp is 60℃ / 140℉. Note: Please turn the fan off immediately if the blades get stuck by other objects and turn on after clean.

From the fan, a single exhaust duct exits through the roof. Each bathroom has its own switch and operates independently.

So, you should either buy additional inline fans and use speed controller on that also. Or you can switch some other methods of noise reduction in this list. 3. Use Neoprene Duct Clamps to Join ...