How does it work?


Nanoaircleaner air purifier is based on new technology called photocatalysis. Unlike common air filters, this technology doesn’t trap impurities within the body of the device, but it decomposes the impurities into basic non-toxic species. Photocatalysis is based on simple chemical reaction driven by light. The basic principles of photocatalysis are known for more than a century.

The technology combines a non-toxic highly effective photocatalyst in a form of a thin film and UVA light source (this is the light used in night clubs or as bug-killers). This creates energy that destroys pollutants present in air and transforms them into benign non-toxic substances such as water and carbon dioxide. Thanks to the nature of the photocatalyst that we use this process can go on without the need of changing any filters or need to refill any cartridges. Our product uses titanium dioxide coated on metal substrates. 

The following graphics explains the principle of photocatalysis:

The diagram shows that the reaction is based on generating a free electron, upon irradiating the particle with sufficient UV light. This was first described by Albert Einstein in his works on photoelectric effect which earned him the Nobel Prize in 192. Photoelectric effect forms the base of many modern technologies including solar energy, space exploration or night vision. Photocatalysis is another field utilising this phenomenon. Modern photocatalysis was established in Japan by work of Fujishima and Honda described in 1971.

Widespread use of photocatalysis was till recently restrained by difficulties with the correct procedure of embedding the photocatalyst onto the substrate so a sturdy and robust layer is formed. Thanks to advanced knowledge in nanotechnologies in Czech Republic, the procedure of making a cutting-edge photocatalytic coating was achieved after just 2 years of development. The core know-how lies in creating various thickness of the active layers on metal panels at specific ranges of temperature. 

Nanoaircleaner - advanced air purifier

Nanoaircleaner is using small fans (up to 10 W of power) to drive the air through the device. First a simple washable mesh filter is used to remove large particles (over 100 micrometres). Next the air is directed onto a set of aluminium based panels coated with the photocatalyst. These panels are irradiated with the UVA light which commence the photocatalytic action. Our ingenious design allows for between 2 to 4 sq. metres of active surface to be utilised in the purification process. This guarantees high efficacy of air cleaning. The photocatalyst is not consumed or transformed in the reaction in which the final products are non-toxic species like water and carbon oxide.

In short, smart use of photocatalysis allows for air purification where only the light is needed, there are no filters to be replaced and there is a highly efficient rate of cleaning. Photocatalysis brings in following advantages.  

Air coming through the device is stripped off all the following impurities:

  • Viruses (coronavirus, flu, measles, swine flu, etc.)
  • Microbes
    ◦ bacteria (angína, zápal plic, kapavka, syfilis apod.)
    ◦ moulds etc.
  • Carcinogenic VOC (volatile organic compounds)
    ◦ formaldehyde, benzene, toluene etc. (hairspray, furniture)
  • Carcinogenic nitric oxides (exhaust gases)
  • Allergens (avoiding asthma)
  • Pollen and dust particles
  • Dust and smoke
  • Acari

It is necessary to stress out that other than UVA light source is unsuitable for use in household air purifiers. The germicidal UVC light may be effective, but it is extremely dangerous for the shortest exposure to human eyes can lead to permanent blindness. Also, the UVC produces toxic ozone.

Contacts Retap spol. s r.o.

Retap spol. s r.o.
Vaňkova ulice 730
463 65 Nové Město pod Smrkem
Czech Republic

Write us


Retap s.r.o.
Czech Republic


Retap spol. s r.o.
Vaňkova ulice 730
463 65 Nové Město pod Smrkem
Czech Republic