Cleaning the heat recovery cell

Warning: Always disconnect the power plug before starting maintenance on the ventilation unit. The unit has no safety switch that would switch the power off when the door of the unit is opened.

Check that the heat recovery cell is clean roughly once a year, or whenever the filters are being replaced. Clean by washing as required.

To check and clean the heat recovery cell:

  1. Disconnect the ventilation unit from the mains electricity supply.
  2. Open the door of the ventilation unit by undoing the finger screws and by lifting the door off.
    CAUTION: The door is heavy.
  3. Pull out the black upper support of the cell (E) located above the cell.
  4. Lift and pull the cell (D) out of the unit.
    Important: Handle the cells carefully! For example, do not lift the cells by the layers. The cell layers are very thin and easily damaged.
  5. If the cell is dirty, clean it by immersing it in warm water, to which a small amount of a mild detergent has been added.
  6. Rinse the cell clean with a water spray. Do not use a high-pressure cleaner.
  7. When all the water has drained from between the layers, reassemble the ventilation unit in the reverse order.
  8. Close the door and plug the unit back into the mains.
The heat recovery cell has now been cleaned.