Information for using Air Cleaners

What are Air Cleaners?

Air cleaners, also known as air purifiers or air disinfection devices, can help improve indoor air quality by removing or inactivating contaminants. Air cleaners are able to remove respiratory bugs from the air, they can also reduce particulates from outdoor air pollution. They are not a replacement for ventilation, and improving ventilation should always be the first option. However, they may be useful in spaces where ventilation is insufficient and particularly as a temporary measure whilst awaiting ventilation improvements.  They can also be useful if the provision of extra ventilation increases the amount of outdoor air pollution in your space. 

Choosing an Air Cleaner:

There are several types of air cleaners, the two most common are: 

High-efficiency particulate air (HEPA) filters 

Capable to capture airborne droplets. They can remove respiratory viruses from the air as these are expelled from the mouth/nose in droplets or aerosols.

Periodic maintenance by changing filters

Ultra-violet germicidal irradiation (UVGI)

Capable of sanitising air and surface

Should be installed by professionals 

If installed or operated incorrectly, can be hazardous to health

Other devices exist but their use is  not recommended. Devices using ionisers, plasma, chemical oxidation, photocatalytic oxidisation of electrostatic precipitation are not recommended unless their safety and efficacy is scientifically demonstrated by publicly available test data. If you wish to use these devices seek out independent test data or consult an air quality expert for advice. 

It is important to choose an Air Cleaner based on its Clean Air Delivery Rate (CADR) and to use it in conjunction with other ventilation methods. 

Specifying your air cleaner

In order to reduce contaminants in the space your air cleaners need to:

A manufacturer should be able to advise on the appropriate number and size of air cleaners for your venue. 

Installation and Operation

Performance and Safety

Air cleaner manufacturers

Many companies sell air cleaners and some companies provide hire options. Below are some examples