What Is PHI?


Photohydroionization® (PHI) is an advanced air purification technology

Developed in the USA by RGF® Environmental Group Inc., PHI utilises a broad-spectrum, high intensity UV light targeted on a hydrated quad-metallic catalyst to convert water vapour in the air into airborne molecules of hydrogen peroxide (H2O2).

Once these air cleaning molecules come into contact with – and neutralise – a pollutant, they revert back to Oxygen and Hydrogen. 

Is it safe?

YES! Hydrogen peroxide gas naturally occurs in the air and was originally discovered in the 1800s.

It has been shown to be produced naturally via photochemical, chemical and biological processes.1

Hydrogen peroxide is naturally created in our atmosphere whenever 3 elements are present: oxygen molecules, water vapour and energy (sunlight photochemical).

PHI technology imitates the way nature cleans and purifies the air outdoors

Within the PHI air purifiers, a broad-spectrum (100-380nm) UV light reacts with a proprietary quad-metallic catalyst – made up of Titanium, Rhodium, Copper and Silver – which uses the water vapour in the air to create an advanced oxidisation process resulting in the creation of low-level airborne H2O2 molecules.

These airborne “cleaning agents” then circulate in the treated space, effectively “seeking-and-destroying” a wide range of particulates as soon as they are introduced, including:

  • SARS-CoV-2 (the COVID-19 virus)
  • SARS-CoV-1
  • H1N1 (swine flu)
  • H5N1 (bird flu)
  • Norwalk
  • MRSA
  • Streptococcus
  • Listeria
  • Pseudomonas
  • Escherichia coli (E. Coli)
  • Bacillus globigii
  • Mycobacterium tuberculosis
  • Legionella sp
  • Mould / Yeast
  • Chemical compounds
  • Odours
  • Formaldehyde
  • …and more (view all test results here)

Hydrogen peroxide is a well known and highly effective cleaning and sterilising agent that has safely been used in healthcare and other industries for over 100 years.

The breakthrough innovation of the PHI-CELL® advanced IAQ (Indoor Air Quality) technology is the controlled creation of low level airborne hydrogen peroxide, which circulates in the treated space destroying harmful microbials in the air and on surfaces.

Whilst the airborne hydroperoxide molecules are highly effective at destroying viruses, bacteria, mould spores and other microbials that cause a significant health risk to humans, the airborne gaseous hydroperoxides created by the PHI-CELL® technology has been scientifically tested and proven to be 100% safe for humans.

The PHI-CELL® advanced IAQ technology found in The Clean Air Company’s commercial air purification devices is cleaning and purifying your indoor air in the same way that nature cleans the air outdoors.


1 – European Union, Risk Assessment Report, CAS No: 7722-84-1


It's time to improve your indoor air quality.

PHI® Active Air Purification is the leading technology for clean, safe indoor air. Talk to us about installing the world's best-selling air purification technology in your home, business or facility.