Ozone is gaseous matter with a unique smell. Its name comes from the Greek word “ozein” (odor). The chemical symbol of ozone is O3, and ozone is generated by oxygen (O2) reacting with ultraviolet rays from the sun in the natural world.
Ozone is well known due to the “ozone layer” that exists 20 to 30 km above the earth, and it is believed that the concentration is 10 to 20 ppm. Not only above the earth, but also close to the ground where we live, ozone is generated by the reaction with ultraviolet rays from the sun and is familiar to us. It is believed that the concentration of this ozone is about 0.005 ppm in an urban area and 0.02 to 0.05 ppm on a shore or in a forest on a sunny day.
The following table shows the impact of ozone on the human body and standard value in the living and labor environments for each concentration.
|Concentration (ppm)||Impact on humans|
|0.01||People with a strong sense of smell may smell ozone.||Concentration recognized as safe|
|0.02||People can slightly smell ozone (and eventually become used to it).|
|0.05||Allowable average indoor concentration (Japan Air Cleaning Association)
<Concentration of ozone emitted by OZONEO>
|0.06||Environmental reference concentration of photochemical oxidant (Ministry of the Environment)|
|0.1||People can clearly smell ozone.
Allowable maximum indoor concentration (Japan Air Cleaning Association)
Allowable concentration in a work environment (Japan Society for Occupational Health)
|Concentration that may affect the human body, according to conditions|
|0.2～0.5||Exposure for 3 to 6 hours makes vision poorer.||Concentration clearly harmful to the human body|
|0.5||The upper airway is irritated.|
|1.0～2.0||Exposure for 2 hours causes headache or chest pain.|
“OZONEO” emits low-concentration ozone, and the concentration is 0.05 ppm or less, so does not exceed the “Allowable average indoors concentration” in the recommended applicable range, as shown in the above table. (0.5 times per hour, ventilation test condition*)
When ozone reacts with germs, viruses, odor elements, etc., it returns to oxygen.
If ozone does not react with these elements, it returns to oxygen by itself over a period of time. If low-concentration ozone is continuously emitted, the concentration will not increase inexhaustibly. However, in a limited space such as indoors, the ozone concentration must be of an appropriate value considering the impact on humans.
Maxell designs each product so that the ozone generation is appropriate for each recommended applicable range, and a third party measured the ozone concentration to confirm that it is at the appropriate level for the applicable space.