Boost time
The boost setting allows the boost timer to be adjusted from 1-30
minutes, the default is 15 minutes. This option may also be disabled,
thus removing the option from the menu and setting the overrun to 0.
Inbuilt Ambient Response Humidistat with Rapid Rise Detection
The humidity threshold setting defines at what relative humidity the fan
will trigger, adjustable from 40% to 90% rH. The fan increases in speed
slowly between the trickle and boost speeds between the trigger %rH
and +10%. The trigger point will automatically adjust if the temperature
drops below 18C to prevent nuisance triggering.
The fan also incorporates a rapid rise function to detect rapid rises in
humidity when the ambient %rH is under the threshold setting. If a rapid
rise is detected the fan will increase in speed proportionally between the
trickle and boost settings until the humidity lowers again.
Comfort mode
With comfort mode disabled, the fan will go into boost as soon as an
LS (Light Switch) input is detected and over-run for the set period
after LS is disconnected.
With comfort mode enabled, the fan will remain off / in trickle up to a
maximum of 20 minutes. Once LS is deactivated, fan will run at
boost mode for the length of time LS was present up to a maximum
of 20 minutes plus the set over-run time.
If the LS was activated for < 3 minutes, no boost will occur to
prevent nuisance activations.
Fan Control Mode
There are 3 modes for fan speed control. Wall, ducted and constant
airflow/ volume (CV) mode (CV - Pro models only). In wall or ducted
mode, the fan speeds are pre-determined at the factory and does not
use the airflow sensor.
In CV mode (Constant Airflow/Volume), the fan will automatically adjust
the fan speed to maintain the desired airflow. After the first 15 minutes of
operation the fan enters calibration mode to determine the most efficient
mode of operation.