Two clearly separated speed ranges give installers direct control of
background and boost ventilation. Set each duty, measure at the grille
and verify the required airflow before handover.
Two airflow stagesEASY COMMISSIONING
Set trickle airflow
Adjust the fan from 0–50% to establish the required continuous
background ventilation rate.
Background ventilation, properly set
Adjustable from 0–50%
Measure airflow at the grille
Fine-tune to the required rate
Once verified, the trickle setting provides the continuous
low-energy airflow specified for the room.
Set boost airflow
Adjust the fan from 50–100% to provide the higher airflow needed
during periods of increased demand.
Demand airflow, clearly defined
Adjustable from 50–100%
Measure airflow at the grille
Fine-tune to the required rate
Once verified, the boost setting gives the installation a
defined higher-speed response when additional extraction is
required.
