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L8000013 –
Maintenance instructions for Duco Ventilation systems
E. Heat Recovery Ventilation System
E.1 Maintenance frequency
1� Cleaning must be done by an accredited installer�
2� In order to guarantee proper and safe operation, the DucoBox WTW must be (visually) checked and inspected at least
every 12 months by an accredited installer or service organisation�
3� The maintenance of the DucoBox WTW is limited to checking the fan once a year and for leaks on water-side parts�
4� The filter of the DucoBox WTW must be checked and/or replaced annually to ensure proper operation of the heat
recovery ventilation system� If the filter is not replaced every year, the dust particles will accumulate, which may cause
malfunctions�
5� Technical maintenance of the DucoBox WTW is not necessary�
6� When the DucoBox WTW is used in combination with a cooker hood where this cooker hood without motor is fitted to one
of the connections in the kitchen, the maintenance frequency will be higher than indicated above� This will require addi-
tional maintenance, such as cleaning / replacing filters and the motor� The maintenance frequency of the filter may then
have to be adjusted, due to a greater degree of fouling� If a cooker hood is connected to the ventilation system, the filter
needs to be replaced every 4 months� DUCO recommends installing a cooker hood with a motor and its own connection
to the outside�
E.2 How to replace filters
1� The filter must be replaced by the resident�
2� Filters cannot be cleaned�
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Manual cleaning with a vacuum cleaner can damage the fine structure of the filter� This also applies to washing
out the filters�
3� Replacing the filter
a� Open door
b� Replace filter
c� Close door
