4
3. Operation
3.1 Operational diagram
3.2 Description
The outside air (1) is drawn in through the filter (2) and the heat recovery unit (8) by means of the
fan (3), after which it is blown into the room (5). The inside air (6) is drawn by the fan (9) through
the filter (7) and the heat recovery unit, after which it is blown outside (10).