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Interior of industrial air purifier showing air filters

World-class industrial air filters

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Zehnder’s industrial air filters capture pollution particles of every shape and size. Our unique approach means we have an air filter solution for businesses of all sizes and from any sector.

How you benefit from our industrial air filters

Zehnder’s air cleaning solutions offer many different kinds of filter configurations, tailored to fit specific environments.

Filters can be divided into three basic types, based on the filtering method: electrostatic, compact and bag filters. Each filter type also comes in a number of different classes, ranging from coarse filters for catching larger particles, to what’s known as HEPA filters for much smaller, ultrafine dust, viruses and micro-organisms.


If you then factor in Zehnder’s extensive range of air purifiers which contain the filters, there are hundreds of possible combinations to capture many types of dust, fumes, oil mist, gases, germs, micro-organisms and viruses.

In most cases, we combine different filters to ensure the most effective performance of our air cleaning systems. If needs be, we can provide tailormade options, too. By doing this we ensure the best possible air quality in for your business.

Industrial air filter working principle

How our industrial air filters work

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Let‘s solve your dust problem together
Dust is a complex issue that needs expert attention. We‘ll help you find the most appropriate filter solution for your business. Request a call back to discuss your needs!
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Dust and virus filters in detail

Often we cannot see the things that cause potential harm, like airborne dust particles and viruses. Our high-quality dust and virus filters ensure we protect people‘s health and the environment in which they work, product quality and machinery too.

Compact filter and industrial HEPA filter

Compact filters come in many different filter classes, ranging from coarse filters for trapping larger, coarse particles, to what’s known as HEPA filters for harmful ultrafine particles, whether chemical, biological or even radioactive. They work as supportive filters and can be obtained in different filter classes (up to HEPA 14).

Compact filter for industrial air purifier
Flimmer filter

A Flimmer filter consists of thousands of polypropylene fibres that capture particles mainly using an electrostatic charge. Unlike some other filters, the Flimmer allows a high rate of air flow through it, even when it contains lots of dust. It can be used as Flimmer-only option or as a patented combination with a bag or compact filter. Using the Flimmer as a pre-filter to a compact or bag will significantly prolong the life of the secondary filter.

Flimmer filter for industrial air purifier
Bag filter

Bag filters are typically installed in places with very large amounts of dust. They can be used on their own or work in a combination as a pre-filter (before the main filter) or second filter.

Bag filter for industrial air purifier
Air purifier with HEPA 14 filter cleaning viruses and other airborne germs from the air
Industrial air purifiers for viruses

Virus Shield: Capturing 99.995% of airborne viruses

Zehnder’s Virus Shield filter system combines a Flimmer filter with a HEPA 14 filter to trap even the tiniest of airborne germs – and keep the air cleaner and safer for you.

Discover Virus Shield

Dust formation and definition

In simple terms, dust is a form of air pollution consisting of airborne particles often referred to as particulate matter (PM). Dust in industrial workplaces can occur naturally – as pollen, for example – or from human activity, including manufacturing, construction, farming and quarrying. Particulate matter comes in different sizes, most of which is invisible to the naked eye.

Different particles and their sizes compared

What are filter classes?

A filter class describes how well a filter performs in trapping different particle sizes/PM categories. As well as guaranteeing our filters meet rigorous requirements, it’s a good way to ensure you’re using the right product to filter out the type of dust particles in your workplace.

Definition of particle sizes
  • PM1: particles less than 0.001 mm
  • PM2.5: particles between 0.001 mm and 0.0025 mm
  • PM10: particles between 0.0025 mm and 0.01 mm
  • Coarse: particles equal to or larger than 0.01 mm

Air filter standards explained

ISO 16890 and ASHRAE 52.2

ISO 16890 is the internationally recognised classification and testing standard for air filters and replaced the old EN779:2012 norm. It is very similar but not identical to the ASHRAE 52.2 standard which is mostly used in the USA. In order to meet the ISO16890 standard, a filter has to capture at least 50 % of particle sizes from any given particulate matter (PM) category.





ISO 16890 and ASHRAE 52.2 air filter standards

EN1822 is the valid standard for certifying for EPA, HEPA and ULPA filters. It´s the official standard in Europe and USA.

EN-1822 Air filter standard

Let's start a conversation

Our air cleaning systems are transforming working environments and improving the performance of businesses everywhere. If your business cares about clean air, get in touch with us today to find out how we can improve the air quality at your site!

Ben Simons Country Manager UK  +44 7909 533878  Mail to  Connect with me on LinkedIn
Ben Simons