Air control module

A method for mechanically modulating electric power consumption of a blower motor associated with a ventilation unit, said method comprising:

• determining in a processor a volumetric airflow requirement based on sensor data and on at least one control signal related to the sensor data;
• selecting for a damper blade associated with said ventilation unit a modulated flow position corresponding to the volumetric airflow requirement;
• generating in said processor a command signal corresponding to the modulated flow position;
• and
• adjusting said damper blade in response to the command signal by pivoting said damper blade within a casing enclosing a flow passage, thereby modulating electric power consumption of said blower motor;
• wherein a broadest surface of the damper blade has a generally rectangular shape with rounded corners and has a height and width that substantially corresponds to a height and width of the flow passage;
• wherein selecting a modulated flow position includes selecting a position from a range of positions between a first position corresponding to a maximum flow of said blower, and a second position in which said damper blade is pivoted to stand perpendicular to said flow passage;
• and
• wherein in the second position the damper blade obstructs about 84% of the flow passage, the rounded corners of the damper blade permitting the flow passage to remain about 16% unobstructed when the damper blade is in the second position.