These types of radicals are produced naturally in the ambient air, as part of its own natural cleaning and purifying process. Oxidising agents (which includes the Hydroxyl Radical) are produced naturally when natural gases in the atmosphere are exposed to sunlight. 

This molecule is often referred to as "the atmosphere's detergent", as it reacts with a large number of pollutants and plays an important role in eliminating greenhouse gases.  

Whilst it's true that Hydroxyl Radicals can lead to a chain destruction effect on cell organisms, the human body is able to neutralise them easily.

The biological lifespan of OH· is very short, which means that it react very quickly with anything that it come into contact with and causes a chain reaction to decompose other elements in order to “steal” an electron from them for its own self-stabilisation. The human body generates enzymes that are capable of neutralising this action, such as Catalase or Dismutase. 

Yes, a scientific study was published by the IJOER magazine which is titled "Evidence of OH• radicals disinfecting indoor air and surfaces in a harmless for humans method"  

Yes, it has two antioxidant systems: 

• Endogenous: these are naturally produced by the body. For example, antioxidants that are found outside of cells which include Albumin, Bilirubin, Ceruloplasmin vs. those found inside cells, such as Catalase, the Q Enzyme, Ascorbic Acid (otherwise known as Vitamin c), Vitamin E, and Uric Acid.
• Exogenous: these are either obtained by ingesting foods with antioxidant properties or via an intravenous injection of antioxidants. For example, some antioxidants that can be obtained from foods are Zinc, Selenium, Ascorbic Acid, and Vitamin E. 

Large concentrations of Ozone can be harmful for the respiratory system, but the Wellisair device only emits very small amounts of Ozone which does not pose any problems for the human body. 

In order to prove that Ozone emissions from this device will not have any harmful effects on humans, the Ozone level was certified by the American standard "UL 867 Electrostatic Air Cleaners" for electrostatic air purifiers. 

Ozone is a very powerful disinfectant and it is essential to ensure that it is never emitted in concentrations of more than 0.050ppm, as this could affect a person’s health. The Wellisair Ozone generator controls and generates the exact ozone quantity necessary for reacting with the essential oils found are inside the device for the purpose of diffusing Hydroxyl Radicals in order to produce an Advanced Oxidation Process (AOP). 

Limonene is a natural essential oil that is considered to be a broad spectrum bactericide. It will have no effect on humans as the cartridge wick only expels a very limited amount - just 0.4 grams every 24 hours. Such low concentration levels have no effect on the human body. 

However, you should exercise caution when handling and replacing cartridges and avoid this liquid from coming into contact with your skin, eyes, nose or mouth. Never inhale or ingest Limonene. 

In the event that any of the above-mentioned situations should occur, seek urgent attention from the healthcare authorities, citing the code for D-limonene (Dipentene) CASE Nº 5989-27-5. 

No, in fact, it is beneficial for you as it will eliminate any viruses or bacteria, at the same time as improving air quality, eliminating any odours, and helping to conserve any fresh food such as fruit and vegetables. 

Yes, as it has no effect on people. The human body also has a tripe antioxidant protective system.

No, quite the opposite, as it would help them to keep the air free from pathogens which could inflame their condition.