Bresser VENT AIR H Manuel D'instructions page 21

3. Press touch control for approx. 3 seconds to delete MIN/MAX
values manually.
Atmospheric change
The device uses the measurement data to calculate the absolute
humidity. The icons indicate how the ventilation would affect the indoor
climate:
Moister. Expected increase in humidity by 5% or more.
Constant. Expected increase or decrease in humidity by a maximum
No Symbol
of 4%.
Dryer. Expected decrease in humidity by 5% or more.
NOTE!
Read chapter "Ventilation indicator" for more information.
Ventilation indicator
The ventilation indicator (14) relies on the information of the atmospheric
change (15) and the indoor humidity indicator (3). It is shown on the
display as follows:
Ventilation recommended. Open your window.
No ventilation recommended.
NOTE!
To ensure the ventilation indicator can function as required, the
outdoor sensor must be placed outdoors, otherwise the result can
not be calculated properly.
IMPORTANT!
Windows should be opened wide for a short time (a few minutes) for
effective ventilation. If possible, open windows on opposite sides of
the apartment (full ventilation).
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