Service and maintenance

Regular maintenance

Filters

The main purpose of the filters is to protect the ventilation unit and, in particular, the heat exchanger and fans that could otherwise be damaged by dust and dirt.

Dirty filters lead to worse indoor climate and higher energy consumption. Dirty filters should therefore be replaced. Dirty filters can also affect the humidity control in the ventilation unit, so that it no longer works as intended.

The factory setting of the control system is set to 90 days, which is suitable for most installations. However, if you live in a city near a busy road, you may need to change the filters more often. On the other hand, if you live in a rural area, you may not need to change the filters as often.

The standard filters in the ventilation unit are ISO Coarse > 65% (G4). If you install a pollen filter ISO ePM1 50-65% (F7), you do not need to change the pollen filter as often, as its filter area is larger. It may then be necessary to change the pollen filter only every second or third time, depending on its condition.

Replacing filters

Before opening the door, switch off the ventilation unit on the control panel under "Operation" in the settings menu.

Tilt out the top door, pull it up and set it aside.

Loosen the screws in the next door and set the door aside.

Remove the two filters from the ventilation unit. It is advisable to vacuum and clean the filter chambers for possible dirt, cobwebs and leaves.

Remove the two metal rails and the filter blade from the filter frame.

Insert the new filter blade smooth side down into the filter frame.

Press the filter blade firmly into place in the filter frame and gently push it to the sides of the frame. Insert the metal rails and filter back into the unit with the filter blade facing up.

Turn on the ventilation unit. Press the alarm icon to reset the filter alarm.