Frequently Asked Questions

How PRS improves your building

Your Questions Answered

We have endeavoured to pre-empt most of your initial questions in the section below. If you have further questions or need a specific response, please contact us here.

All purchases include a full consultation process which includes video conference calls, CAD drawings and site visits. Each system is manufactured and calibrated on a bespoke basis.

What is the purpose of the Pathogen Reduction System?

The Pathogen Reduction System© (PRS) is the world’s leading UVC technology for commercial air-handling systems. Once installed it helps prevent airborne transmission of bacteria and viruses, within your building.

It inactivates 99.99% of airborne pathogens, including SARS-COV-2, measles, MRSA and Influenza, as they pass at speed through the optical chamber. It is the ability to inactivate pathogens in a very short residence time that makes PRS unique.

PRS can be installed in new builds or older buildings alike.

How does the PRS work?

With the PRS installation, all the air within a building that circulates through the air handling system is passed through our optical cavity which bombards this air with high intensity UVC 254nm light, from 360˚. This inactivates 99.99% of COVID-19 and other pathogens including MRSA, TB and Influenza, ensuring your air supply to the building is safe.

Has PRS been tested?
Yes, we conducted a series of structural, mechanical and performance tests.

Testing at a Bio Safety Level 3 Lab in California demonstrated PRS’s ability to inactivate aerosolised SARS-CoV-2, Influenza A and Measles viruses introduced into the optical chamber in air traveling at 6 m/s. The ‘kill’ rate for all three viruses was in excess of 99.99%

The results demonstrate that PRS is the world-leading solution in its field and delivers performance far in excess of previous industry standards.

The system has also been tested for UVC and electrical safety. Details of all testing can be found in this downloadable information sheet.

How will this make the building environment safer?

By inactivating pathogens within the air handling system, the overall level of pathogens in the building’s circulated air is significantly reduced. A well-designed air management system will be changing the air inside a building many times each hour, with each change of air being processed through the PRS unit.

This process inactivates pathogens and ensures the inside air is continuously diluted with pathogen-free air, helping to stop the recirculation of viruses around the building. This is achieved in a safe and energy efficient manner and ensures a better indoor environment.

PRS is an essential layer of defence against airborne pathogens, such as Influenza A and MRSA, and of course Covid-19 and all its variants. It will have a significant impact of Sick Building Syndrome helping to improve staff activity and attendance levels.

Installing PRS means you are doing everything you can to keep people safe, now and in the future.

How does it fit into my existing ventilation system?

PRS is designed to work with your existing ventilation system. Our experienced building services professionals will survey your building, in cooperation with your engineering team, to determine exactly what is best for your building. 

Each Pathogen Reduction system is built bespoke to your system, designed to suit your specific needs, whether it is a large duct situated in AHU plantrooms or smaller ducts from MVHR units. 

UVC levels are calculated for the individual need of each installation, taking into account the required inactivation percentage, ducting size, and the air speed and volume within your system. This delivers the optimal solution for your building.

Are there any detrimental effects on my ventilation system?

No. Due to its design the impact of PRS on the airflow of your ventilation system is negligible. 

As the optical cavity is a bespoke build, it will fit perfectly into your system. The UVC panels of light are positioned on the perimeter just outside the normal airflow so it will operate exactly as it did prior to the PRS installation. 

This allows you to benefit from the economic and environmental efficiencies that your air handling system has always provided.

Is the UVC light a danger to our maintenance staff?

UVC 254nm light is used in our anti-pathogen system. High level radiation is a danger to human beings so the following safety measures have been built into the system to protect service personnel:

  • UVC containment section – eliminates UVC leakage outside the optical cavity, ensuring UVC light cannot bleed into, or out of the ducting
  • Automated cut-off – this mechanism turns off the UVC light source in the event of airflow being turned off for maintenance or the air handling system fails
  • Power interlock – automatically turns the power off if anyone attempts to open the PRS
  • Safety maintenance key – ensures that the system cannot be turned on during maintenance
What are the key benefits of installing PRS?

PRS will ensure that the recirculated air is free from airborne pathogens (up to 99.99%), ensuring that any residual build-up of is pathogens minimised – virions that enter the circulation from an infected person will be treated at every pass through PRS, and will not be passed on to other areas of the building via the HVAC system.   

Such treatment of air will also help to reduce cases of Sick Building Syndrome, leading to increased attendance and productivity. 

With PRS installed, your building will be ‘future-proofed’ against other pathogens and variants of Covid-19. 

Buildings will be able to run as they were designed to, and not have to operate on 100% fresh air, which leads to large increases in energy costs and degradation of plant.  

How do you monitor the system?

We offer three levels of monitoring:

  1. A basic status on the control panel
  2. A healthy or fault status to each lighting box
  3. A fully integrated system status with BMS
Where is PRS manufactured?

PRS units are currently manufactured in the UK, however overseas manufacture is planned for 2022.

What are the maintenance requirements?

The UVC lamps will need to be replaced every 1-2 years depending on how many hours a day the air handling system is running. General cleaning can be undertaken at the same time as standard cleaning practices for the HVAC plant. 

At the time of purchase, we will agree a maintenance contract to suit your projected usage.

Can we view the system in operation before purchasing?

Yes. Please contact us via the Contact Form to arrange a viewing.

Engineer