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Replacing MVHR filters

In the article we would like to talk you through the do's and don'ts when replacing heat recovery filters



Do you replace your MVHR filters sufficiently?

Do you have a heat recovery unit in your home or building? Then you should make sure to replace the filters on a regular basis. Mechanical ventilation with heat recovery systems (MVHR systems) filter fine dust and polluted air particles from the incoming air that enters your home via the heat recovery unit. In this way, the MVHR filter ensures clean air in your home. It is therefore logical that, after a while, the heat recovery filter will be full of dirt particles through which clean air can no longer pass. Not only do dust and dirt particles collect on these heat recovery filters, if you do not replace them regularly, harmful fungi can also start to live.


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Do you live along a busy highway or is there a lot of construction work going on in your neighbourhood? Your heat recovery filters will probably become clogged and dirty sooner. Make sure you check these at least every 3 months and replace your heat recovery filters at least twice a year. Do they look black from the dirt? Then they need to be replaced immediately! So it is a good idea to have several heat recovery filters in stock at home. After all, you don't want to live in a polluted environment and breathe polluted air.



Is a heat recovery filter easy to replace yourself

Yes, a heat recovery filter in the heat recovery unit is very easy to install/replace yourself. Make sure you know what kind of filters are common in the heat recovery unit you have. There are three different types of heat recovery filters, namely: filters with wire frame, without wire frame and panel filters.The most important thing is to select the right filter for the right heat recovery unit, more on this in a moment.

Make sure that the heat recovery unit is not switched off unnecessarily for a longer period of time – only in case of maintenance. Are you worried that you won't think about replacing the heat recovery filters or that it will be forgotten in the hustle and bustle of everyday life? We will be happy to remind you with our heat recovery filter service. This is necessary for the air quality and your energy consumption!


Replacing a heat recovery filter with threaded frame

  • Make sure there is no voltage on the heat recovery unit by unplugging the heat recovery unit from the socket. Make sure, however, that the heat recovery unit is not without power for too long.
  • Remove the front panel from the heat recovery unit. Do you not know how to do this? Please refer to the manual of your heat recovery unit.
  • Remove the dirty heat recovery filters from the heat recovery unit.
  • Insert the new heat recovery filters into the heat recovery unit.
  • Replace the front panel on the heat recovery unit.
  • Plug the plug back in so that the heat recovery unit will not be without power for too long.


Replacing a heat recovery filter without threaded frame

  • Make sure there is no voltage on the heat recovery unit by unplugging the heat recovery unit from the socket. Make sure, however, that the heat recovery unit is not without power for too long.
  • Remove the dirty filters from the frames.
  • Place the new clean filters over the holders and make sure they are securely attached.
  • Then slide it back into the heat recovery unit.
  • Plug the plug back in so that the heat recovery unit will not be without power for too long.


Replacing a heat recovery panel filter

  • Make sure there is no voltage on the heat recovery unit by unplugging the heat recovery unit from the socket. Make sure, however, that the heat recovery unit is not without power for too long.
  • Remove the dirty panel filters.
  • Insert the new filters into the heat recovery system.
  • Plug the plug back in so that the heat recovery unit will not be without power for too long.


Please note, not every heat recovery filter fits!

Heat recovery filters are made to fit a certain brand and type of heat recovery system. Every manufacturer has its own filter sizes, such as length, width and thickness. The choice of filters depends on the brand and type of heat recovery system. To always be 100% sure that you are ordering the right filters, we recommend that you always look at the type plate on the heat recovery system (your ventilation system). This way you avoid ordering filter(s) that are too small or too large. Click here and go directly to our MVHR filters.


New standards


Maybe you have heard of it before: the new filter standard "ISO16890". Filter classes G3, G4, M6, F7 etc. will disappear over time. The ISO16890 was created in order to be able to indicate in even more detail what percentage of which particles are retained by the filter. In other words, the smaller the ISO ePM value and the higher the percentage, the better the filter. For a more detailed explanation and extensive information, please visit our blog about: New regulations on heat recovery filters: ISO16890.


Cleaning of your entire heat recovery installation

If the heat recovery filters need to be replaced, you can assume that the ventilation valves also need to be cleaned. You can easily clean and dust them. Make sure that you remember how far the ventilation valves should be open. Put them back like this. Your heat recovery unit also needs to be cleaned once in a while. Never do this yourself but have thorough and professional cleaning performed by a professional company. Thorough cleaning of your heat recovery unit once every 7 to 8 years should be sufficient, depending on your living situation (e.g. if you live next to a busy road or along an industrial or construction site).

A clean heat recovery installation and clean heat recovery filters are necessary to guarantee a clean and healthy indoor climate. Therefore, follow these instructions carefully!


Conclusion and tips

  • Filters are there for your own health.
  • Replace filters two to three times a year.
  • Heat recovery filters are easy to replace yourself.
  • Each filter is unique and suitable for a certain brand and type of heat recovery.
  • Vacuum filters once a month with the vacuum cleaner at the lowest setting.
  • If a filter is not replaced (in time), serious health problems can occur.
  • Blowing out filters with compressor. If this happens carelessly, blow the filter cloth apart or out of the frame.
  • Wash out/flush filters with water/soap or similar. This changes the progressive structure of the filter, causing it to lose its function.
  • Place a pollen filter in the drain. This creates more resistance and has no efficiency because this filter is pure to keep the heat exchanger free of coarse dust particles. This air is still vented to the outside.


















(Quantity) discount heat recovery filters - we automatically adjust our price

Order more and pay less! To ensure the air quality you should replace your heat recovery filters several times a year. If you order more than one (two items for example) we will immediately adjust the price in the shopping basket. Below you will find an overview of the bulk discounts for heat recovery filters.


Number of products Discount
0 - 1 0%
2 - 4 5%
5 - 9 7,5%
10 - 14 10%
15 - or more Please indicate the number and the link to the product(s) via the contact form


If you have any questions about this article, please contact us and we will be happy to help you.



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