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Maintenance of the filters should be done regularly. Dirty filters can decrease air flow and
consequently the capacity. Synthetic or metal filters can be cleaned or washed. However it is advised to
change synthetic filters every two years.
8.3. Heat Recovery Exchanger
Is controlled before transportation. The plates of heat recovery exchanger should be checked, after
transportation.
8.4. Fans and Motors
Wiring shall be done, according to international standards. The turning way of fan-blades should be
checked, according to the air-flow direction label on the fan.