The Panasonic Ceiling Ventilator is constructed to provide 24 hour ventilation – it can be set after the timer has concluded to run a airflow level for continuous period at either low, medium or high speeds. This fan includes a built in back draft damper and is a super quiet fan only producing a noise level of 36.5 dB(A) at its maximum speed.
It is recommended not to install the exhaust fan directly into plasterboard. Alternatively, you can install a piece of wood or metal material onto of the ceiling fan and screwing into this for installation.