Filter Testing



How Efficient Are Your Filters?

As the only laboratory in the UK to hold UKAS accreditation to ISO 17025:2017 for filter testing, Particle Technology is the recognisable choice for assessing the essential performance characteristics of filters, from HVAC units, gas turbines, internal combustion engines and compressors.  

Air filter testing for heating, ventilation & air conditioning (HVAC)

Air filters are the critical component in HVAC systems, providing clean, breathable air to the indoor environment. Air filters efficiency testing within these systems is a vital process in maintaining the quality of air, and reducing the health hazards associated with indoor air pollution and infection transmission.

Our air filter testing helps you to ensure you are providing the best HVAC filter for each intended application, with tests such as:

  • Initial efficiency
  • Discharge efficiency
  • Airflow resistance (differential pressure across the filter)
  • Test dust capacity
  • Arrestance

Your results will be presented in a formal test report, which also includes the official filter classification:

Air Filter Testing


Our test facility includes state-of-the-art equipment with the capability to test air filters beyond the requirements of EN 779:2012 and ISO 16890:2016. We have:

  • A 35 kW fan that can generate up to 17,000 Pa of pressure at 3400 m3/hr or 14,000 Pa at 5400 m3/hr
  • Oil and salt aerosol generators from PALAS and TSI to determine filter efficiency
  • Upstream and downstream particle counting conducted using a PALAS Welas 3000 particle counter with a measurable range of 0.2 µm to 100 µm
  • TOPAS TDC 584 cabinet for the IPA vapour discharge test in accordance with ISO 16890:2016-4
  • TOPAS SAG 440 dust feeder for dust concentrations including 70 mg/m3 or 140 mg/m3 depending on the test standard

state-of-the-art equipment with the capability to test air filters

We can also design and manufacture bespoke filter housings to meet the demands of our customers. As with all of our testing services, our experience, expertise and existing facilities allow us to tailor our services to suit your specific needs where required. Whether it’s testing with a modified yet controlled test media, such as coarser or finer dust more suited to your needs/expectations, or carrying out testing at modified durations, concentrations or velocities, we can accommodate and discuss these details with you during your consultation.

Solid aerosol dust dispersed in duct with compressed air venturi injector

Air filter testing for internal combustion engines & compressors

Efficient inlet air cleaning for internal combustion engines and compressors is crucial if you are to prevent a breakdown of a road vehicle or compressor. The essential performance characteristics are differential pressure across the filter at a specified air flow rate, particle removal efficiency, arrestance and test dust capacity.

Particle Technology has many years of experience in air filter efficiency testing to international standard ISO 5011:2014. We can perform tests using a range of materials to suit different applications and have a selection of calibrated dust feeders available – these enable dust concentrations to be controlled from a few mg/m3 up to hundreds of g/m3.

If you are testing big or small air filters and you do not have a filter housing available, we will design and manufacture bespoke filter housings to meet your demands.

Air filter testing for gas turbines

The air filter in a gas turbine helps to protect it from damaging particles in the atmospheric air that flows through the system.

With our bespoke duct insert, we can test cone or cylinder filter elements in accordance with EN 779:2012, and also ISO 16890:2016 if desired. The TDC 584 cabinet for IPA vapour discharge can accommodate individual filter elements up to 1000 mm in length. We can carry out extended testing beyond the requirements of the standards to reach final differential pressures of up to 6000 Pa and elevated dust feed rates.

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Want to know more? Please get in touch and let us help you by making particles count.

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