This guide will show you how to clean the heat exchange cell which Vent-Axia advise should be done once a year.

Remember apart from when you clean the heat exchange cell it should never be turned off.


Aucune pièce nécessaire.

Turn the heat recovery system off at the wall.
  • Turn the heat recovery system off at the wall.

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Remove the 6 screws from the heat recovery panel.
  • Remove the 6 screws from the heat recovery panel.

  • You may need a friend to help you lift the panel off and hold the screws for you!

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  • Remove the internal filter on the left hand side using the pull tab

  • Repeat for the external filter on the right hand side of the cell.

  • If required clean them using a hoover.

  • Do not wash in water under any circumstances

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  • Gently take the cell by the pull tab

    • You may have to rock it gently to get it out.

    • Gently and slowly is the most important step here.

  • The cell will begin to slide out

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  • Clean the cell on each side with a hoover to remove any dust

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  • Fill a bath with warm water and add a small bit of fairy liquid or similar.

  • Place the cell into the water

    • Gently hold the cell

    • Rock the cell from side to side. Ensure the cell is not scraping the bottom

    • Lift the cell up and let the water drain out.

    • Repeat for each side of the hexagon

    • Remove from the bath and leave to dry

  • Vent Axia tehnical support told me the cell can be a little damp but ensure all water is out the cell.

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  • Clean inside the heat recovery system with the hoover

    • Remove any dead flies

    • Check the fans for any build up of dust

  • If you have the summer bypass fitted (the white grill) Don't yank it, as its attached via a cable.

    • Gently lift it to clean the fan behind

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  • Begin to insert the cell back in.

    • Slide using the plastic tab

    • Ensure the two black arrows meet

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  • Put the cover back on

  • Insert the screws and secure the cover to the MVHR.

  • Leave the internal and external filter out for now

    • We will slide them through the filter flaps later.

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  • Insert the filters into each flap (clean if needed using a hoover)

  • Close the flap

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  • Turn the heat recovery back on

  • It will go through its initial power on so don't expect the fans to start immediently.

  • If you have a message on the screen saying check filters you can clear it (once the filters have been cleaned) by:

    • Waiting until Normal airflow xx% is displayed on the screen

    • Press and hold the up and down arrows for 5 seconds

    • This will reset the cycle for the filter clean. Whenever you see the check filter message clean the filter (remember this is separate to the cell).

    • Keeping your MVHR cleaned to the Vent-Axia recommendations gives you the best chance of having many years of trouble free service.

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Your heat cell is now clean. Vent-Axia recommend you clean the cell once a year.

Remember to clean your filters as needed. If you want any extra information all appropriate manuals are attached to this guide.

2 autre(s) ont terminé cette réparation.


Membre depuis le 04/05/2014

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2 tutoriels rédigés

Nice guide! I also found a cool website where you can by replacement air filters for mvhr systems

Martin Smith - Réponse

Yes, this was an extremely useful guide. The maintenance manual simply says “withdraw the heat exchanger”, but it was as tight as a gnat’s a**e. Tom’s guide gave me the confidence to use a bit of gentle persuasion. Thanks :)

Terry Ellison - Réponse

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