Karmann-Mobil DAVIS 540 2023, Operating Manual

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Windows and roof lights
EN 87
11.10 Correct ventilation
Regular ventilation is important for preventing excess moisture in the vehicle and the associated risk of
mould forming. The moisture almost always comes from the interior ambient air
– with only a few excep-
tions. The warmer the air, the more water it can absorb (relative humidity). If the moisture-rich air cools
down and reaches the saturation limit, it emits some of the water as condensate. We are rarely aware of
just how much water is released during normal use inside a motorhome or caravan and then absorbed by
the air. Just while sleeping, a person emits about half a litre of water through the skin and breath. The air
also absorbs steam during cooking, washing dishes, showering and washing laundry. The steam addition-
ally absorbed by the air has to be removed from the motorhome or caravan regularly, if damage is to be
avoided.
You should note the following:
●
Short, intensive ventilation periods are ideal, based on demand yet always energy-conscious. You
should open roof lights, windows and the door for a brief period, ideally creating an air flow to the
outside.
●
Ventilate the superstructure and the driver ’ s cab for at least 10 minutes several times a day.
●
Larger steam quantities which are generated e.g. during cooking or showering should be carried
off to the outside immediately with targeted ventilation.
●
Heat the superstructure sufficiently and – most importantly – continuously!
●
Keep the transition to the driver ’ s cab closed as much as possible (e.g. with a thermal curtain).
●
Turn down the heating while ventilating. But exercise caution during periods of frost! Only shut
off the heating during short, intensive ventilation periods, otherwise there is a risk of the water
freezing.
●
Avoid continuous ventilation during the heating period. Open windows cause much greater heat
loss compared to a short, intensive ventilation period.
Note: The oxygen inside the motorhome is consumed by people breathing and by use of
the hob burners. Ensure that there is a constant exchange of air by opening windows or
roof lights. Air out your motorhome from time to time, even if you are not using it.