Main parts

The figure shows the Vallox R model. In the L model, the parts are mirrored.
No.PartNo.Part
2aHeat recovery cell7aSafety switch
3aExtract air fan9aCeiling bushing for electric wires
3cSupply air fan10aControl panel
4aFine filter for supply air11aInternal humidity sensor
4bCoarse filter for supply air11aInternal carbon dioxide sensor
4cCoarse filter for extract air11cCarbon dioxide sensor (optional)
5aBypass damper of the HR cell11dHumidity sensor (optional)
6aPost-heating resistor11eVOC sensor (optional)
6bAdditional heating resistor