Need help? Our FAQ is the quickest way to get help. Here you can check our product possibilities, norms or delivery time. You will also find answers on many topics, such as energy efficiency or indoor air quality.


Why do you manufacture the filters yourself?

Being a manufacturer ensures complete control of our production and shipping line: quality, traceability and delivery time.

Why are your products the only one with a pre-layer?

We are the only company in the world that manufactures its own fiberglass media. We innovated our filters by adding a protective pre-layer to avoid any fiber shedding and facilitate maintenance.

How is it possible for to deliver so quickly ?

AFPRO Filters has its own factories and controls all production phases of filters and packaging. In the Netherlands, the new logistics warehouse is equipped with the latest technologies to guarantee efficient service throughout Europe.

What is your average delivery time?

We strive to get your delivery to you as soon as possible. Obviously, we only have limited control in this process but these are the standard delivery terms:
● Standard products take between 5 working days
● Specials, within 10 working days
Of course, if you have any questions about the status of your order, you can contact us. We can trace your parcel and inform you on the current status.


What is a panel filter?

Panel filters are used as prefilters in air conditioning systems. They are characterized by their flat form and are meant to be the first layer of filtration in order to protect the finer filters from large particles. Panel filters are available in a metal, plastic or cardboard frame and come with a fiberglass or synthetic media.

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What is a bag Filter ?

Bag filters or pocket filters are used as a pre- or fine filter in air conditioning systems. They are characterized by the loose pockets of fiberglass or synthetic media in a galvanized steel or plastic frame.
Our bag filters are Eurovent certified and are available with an A+ label. Their effectiveness against small particles varies from ePM10 up to ePM1 (for better protection).

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What is a compact filter ?

Compact filters are mini-pleated filters, characterized by their high filtration features. Compact filters are used in air treatment cabinets, air conditioning systems, industrial systems and as a pre-filter in cleanrooms.

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Do you sell Nanowave filters?

Yes, we do have Nanowave filter. You can find it here:
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Good to know: other solutions often fit as well. Want to know more about this?
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Do you sell ATEX filters?

Yes, these articles are available but only on special request. Please contact us for a customized quote.
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Do you sell High Temperature filters?

Yes, we sell High temperature air filters on request.

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How do I recognize the efficiency of a filter?

The efficiency is the main characteristic of a filter. It is expressed as a percentage and represents the quantity of particles retained by the filter. On our website and in our catalog, you will find specific information about the efficiency with each product.

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What are the differences between synthetic and fiberglass media?

AFPRO Filters produces its own media in fiberglass. The advantage of a fiberglass media is the mechanical efficiency due to very fine fibers. Also, fiberglass media have a longer performance life compared to synthetic fiber. Synthetic fiber uses the mechanical efficiency based on electrostatic force. With time passing, the performance will reduce while the fiberglass efficiency remains the same.

How do I know which filters I need?

Every industry has its specialized needs when it comes to air filtration. Obviously, a hospital has different demands than for example a museum or a school. Also the type of building, the amount of people inside the building and other variables affect the requirements. This is why we advise you to contact us for a customized advice based on your personal situation. One of our experts will assess the specifics of your business and present you with a fitted plan and a quotation.
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You might want to check out these pages with more detailed information on specific branches:


Museum & library


School & university



Why are filters are called next generation filters ?

Faced with the immense challenges of indoor air quality (IAQ), AFPRO Filters responds with innovation. We own our own factories and laboratories where we control all production phases, from pre-filtration to absolute filtration. We have developed a unique range of fiberglass filter media that facilitate maintenance work, have a longer service life and offer protection against the risk of particle release at the end of its service life.
The main asset of the next generation filter media lies in its innovative and durable pre-layer for easy installation.
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What do you mean by ‘filter class’?

In a world where indoor air quality is a growing source of concern, air filters are crucial to protect your wellbeing. According to ISO 16890, air filters need to be classified according to their efficiency on fine particle sizes (ePM1, ePM2,5, ePM10, Coarse). The efficiency is measured by strict standards. Based on these measurements a class is awarded to every kind of filter.

Do you offer media for higher air flow?

If you are looking for a product with a higher air flow, we recommend our heavy duty product range. These products can be used for a maximum burst pressure drop of 6000 Pa. Check out this product range here:

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HEPA Filters

What is the difference between laminar and turbulent airflow?

Within an area with controlled contamination, the air flow can be turbulent (ISO Classes 6 to 9) or uni-directional / Laminar (ISO Classes 5 and lower).

How often do I need to change the HEPA filter?

It depends on how often the HEPA filters are used. Always check the pressure gauges and pressure switches that indicate the degree of clogging of the filters. If you need help determining whether your filters need to be changed, please contact us.

What is a cleanroom?

The clean room is a contained aria in which the concentration of airborne particles is highly controlled. It is constructed to minimize the introduction, production and retention of particles inside the room. These rooms are usually found in hospitals and the pharmaceutical and chemical industry.

Do you have a recommendation for installing a HEPA filter?

For your HEPA filters to work properly, we strongly advise you to follow these guidelines:
− The HEPA and ULPA filters are individually packed in a plastic bag before being packed in a cardboard box. This way they should be thoroughly protected against any damage during shipping. Still we advise you to please check the entire packaging for any damages upon receipt.
− We recommend unpacking as close as possible to the place of installation in order to avoid any risk of damage.
− HEPA and ULPA filters must be handled by a qualified technician.
− The filters must be dismantled by personnel wearing appropriate clothing (gloves and mask).
− Pressure gauges and pressure switches must permanently indicate the degree of clogging of the filters.

Can I use HEPA with a MDF (wood based) frame in a hospital?

Yes, it is possible and it was often used this way in the past. Still we advise you to use other frames to ensure hygiene requirements. We propose galvanized or aluminum, depending on the thickness of the frame.
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Do you supply HEPA’s with a test certificate?

According to EN 1822, checks must be carried out on 100% of the filters from H13 and up. Therefore, every H13 > filter comes with an individual test certificate.

Which filter classes do you offer?

Our product range offers filter classes E10 to U17, according to EN 1822.

Which types of frames are available?

Different types of frames are available depending on the type of filter and if the airflow is laminar or turbulent.
For turbulent we propose: galvanized steel, stainless steel or MDF (wood based material)
For laminar we propose: aluminum or MDF (wood based material)

What is the height of the material in HEPA?

It depends on the filter. You can check the height of all of our HEPA filters on page 70 and 79 of our catalogue Here.

Do I need the extra grid on HEPA’s? Will it save me money if I leave those out?

Adding a grill is not an obligation and it represents an additional cost. On the other hand, it has several advantages that might save you money in the long run. Contact us to discuss the best option for your project.
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Why can’t or shouldn’t I use MDF frames for a HEPA filter in a hospital?

We do not recommend using MDF frames on HEPA filters as their surface can provide a source of biocontamination (the presence and growth of micro-organisms and their toxic by-products on uneven surfaces).

How do I properly seal the filter for the EMERY test (compression of gasket)?

The clamping system must provide a uniform and reliable compression to ensure the filter is tightly sealed. If you are unsure if your clamping system is performing properly, please contact us.

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Do you offer silicon free HEPA filters?

Yes, we do offer silicon free HEPA filters on special demand. Please contact us for a customized quote: https://www.afprofilters.com/contact/

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Energy efficiency

How can AFPRO Filters help me save energy ?

We design our filters to be very efficient on the amount of energy they use. For example our latest innovation, the A+ bag filter, has a very low air resistance which has given it the A+ energy label.
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For further improvement, we recommend carrying out a LCC (Life Cycle Calculation). We conduct an energy audit to improve the energy performance of your installations while enjoying excellent indoor air quality. To learn more, click here:
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What is an LCC (life cycle cost calculation)?

LCC stands for Life Cycle Calculation. It is an energy audit we use to screen your air filtering system, with the intention to improve the energy performance.

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Do you have any product datasheets available online?

You can request any product datasheet simply by filling in the form and telling us which item you would like to receive more information on. We will get back to you as soon as possible:

Request a datasheet

Can I receive the catalog by post?

Of course! Please fill in the form to order here:
Request the product catalogue

Our catalogue is also available in PDF.
Click here to download

ISO 16890

What is ISO 16890?

ISO 16890 is a classification system that offers standardized measurement requirements on the efficiency of general ventilation air filters, based on suspended particles (PM). It also gives an overview of test procedures and specifies the general requirements for the evaluation and marking of filters, as well as the documentation of test results.

What is the equivalence for G4 and F7 regarding ISO 16890?

There is no official or automatic correspondence between the results of EN 779 and those of the standard EN ISO 16890. However, trends are observed and test results can be compared. For more information on this topic, please contact our service desk.

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Is it possible to wash a media?

Some media can be washed although it will affect their efficiency. We do not advise to wash your filters or media to re-use them. Contact us if you have questions about recycling or re-using air filters: https://www.afprofilters.com/contact/

How often do I need to change my activated carbon filter (molecular filter)?

Once the carbon becomes saturated, it loses all effectiveness as an air filter. Therefore, we advise testing your activated carbon filter regularly. This is the only way to know if the carbon is saturated or not.

How often do I need to change my particulate filter?

We recommend replacing the filter when the recommended pressure drop is exceeded. If you need help to determine if this is the case, please contact us:

How do I know which airflow I need?

You can have a look in our catalogue or request a datasheet via this form: https://www.afprofilters.com/datasheet-request/

Do I need to clean the air handling units and duct regularly?

Managing the air handling unit and duct has two objectives:
1st: to maintain the quality of the air distributed and 2nd: to ensure the optimal operation of the air treatment installation by preserving the integrity of its components (ducts, air filter…).
It is essential to know the history of your installations, to have a global traceability of the maintenance programs and to be able to constitute a health record of the installation. This makes it possible to determine the appropriate monitoring plan and to define the frequency and scope of hygiene operations.
We recommend contacting your installer or maintenance partner on site.

Air filtration and Covid 19

How is the virus transmitted?

The virus is transmitted through vaporised drops of water emitted during sneezing, coughing or talking. It is able to bridge a short distance from one person to another. Also virus particles can be transferred through contact with a surface. To avoid any risk of infection and spread of coronavirus (Covid-19), it is important to wash your hands regularly with soap or disinfectant gel and keep a distance of at least 1.5 meters to other people.

How long can the virus remain active outside the human body?

Indoors, the virus can actively linger in the air for a few hours. In normal conditions, it can also survive up to several days on surfaces in the surrounding area.

What do you recommend for opposing Covid-19 at filtration level?

To prevent the spread of the virus, we recommend that you use ePM1 filters in your regular work areas and EPA or HEPA filters if you work in cleanrooms. These filters guarantee a minimum efficiency of 50% on particles less than 0.1 micron.

What should I do to ensure the best indoor air quality?

For optimal indoor air quality, you need filters that take out particles of less than 1 micron (F9 or ePM1) These filters guarantee a minimum protection of 50% against ePM1 particles.

Can HEPA filters be placed in air handling units ?

General ventilation systems are not designed to use absolute filters such as HEPA filters. We recommend that you install ePM1 efficient air filters that provide the highest possible filtration efficiency. These filters guarantee a minimum of 50% protection against ePM1-particles.

Once the virus is trapped in the filters, can it be released back into the airstream?

Once caught, the virus attaches itself to the air filter fibers. We call this the effect of scattering mechanisms. These particles do not re-enter the air stream. The virus can survive on surfaces for several hours to several days, but eventually it dies on the filter surface.

What are your recommendations for filter replacement?

With regard to replacing air filters, we advise to wait until the filter’s attainable shelf life has almost expired. You can change the filter by following the normal procedure, but taking into account the mandatory hygiene measures.

What are the precautions I need to take when replacing air filters?

Hygiene measures must be observed to eliminate the health risk. To replace the filters first the system has to be stopped completely. When replacing the filter you need to wear gloves, goggles and a mouth mask. The used filter(s) is/are taken in a sealed plastic bag to an official landfill.

What are the recommendations for recycled air?

We recommend that you turn off air recirculation. When air handling units are equipped with a recirculator, the contaminated particles circulating in the extracted air ducts, can otherwise be re-introduced into the air supply system.

What are the recommendations for fan systems?

Some systems, such as fans and induction units, operate with part level circulation. It is recommended to disable these units to prevent viral particles reissuing into your work space. The fans have coarse filters that are hardly able to filter out the fine filter particles, but are able to collect them.

If the fans cannot be stopped, it is recommended to run the fans continuously. Otherwise, the virus can settle in the filters and a restart can cause those particles to return into the air. With continuous circulation, viral particles will become eliminated by the extracted airflow.

How to contact us ?

Our entire team is at your service! Mail to sales@afprofilters.com or call +31 (0) 72 567 55 00 for all your questions and advice.

How can AFPRO filters help me?

  • Our products are available as usual and delivery dates are unchanged. As a manufacturer of our own glass fiber filter media, we are able to accommodate your request for additional supplies.
  • Flexible production: although all orders of HEPA filters are prioritised for the supply to care or hospital facilities, we will do our best to accommodate everyone as soon as possible. Thanks to the doubling of our production capacity, this does hardly lead to any delay on delivery.
  • The dedicated AFPRO Filters customer service staff has mobilized to continue to provide the best service for our partners. Our services and delivery promises remain unchanged. Of course we have no influence on any problems with the delivery of the carriers.

    We want to let everyone know that we empathize with you all. In our minds we are all together and we will not let the coronavirus stop us. Stay home, stay safe and we’ll come back stronger.