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Frequently Asked Questions About Ozone
What is Ozone?
Ozone is active oxygen, O3. It occurs naturally in the earth's atmosphere to protect us from the sun's harmful rays.  
What are some uses of ozone?
Some common uses are: pool and spa water purification, drinking water purification, waste water purification, and air freshening.  
How does the ozone used for water purification affect the air we breathe?
The amount of ozone produced by an ozone generator is insignificant to the normal atmosphere we live in. When dissolved in water, ozone is extremely safe. Excess ozone quickly converts back to oxygen. Note: do not breathe concentrated ozone gas.  
Is ozone the same as "SMOG"?
No! "Smog" is air pollution created by combustion polluters. While smog contains small amounts of ozone, it is largely composed of harmful chemicals such as carbon monoxide. In fact, smog and other pollutants may contribute to the damage of the ozone layer.  
Will ozone hurt me?
No! In the quantities necessary to be effective, ozone is very gentle to humans and equipment in the water. However, you should never breathe concentrated ozone gas.  
Does ozone have an odor?
Yes. Depending on the concentration, the odor ranges from slightly sweet to moderately antiseptic.  
Will ozone kill bacteria?
Yes. It is one of the most effective, complete bactericides of all earth’s measurable elements.  
Will ozone kill viruses?
Yes. Ozone kills virtually all known forms of viruses in water and air.  
How is ozone different from chlorine?
In the quantities needed for water purification, it has no noticeable odor, taste or color. It is not irritating to humans or equipment. Ozone purifies water and air very quickly and efficiently, 3,000 times faster than chlorine. Ozone leaves no by-products except pure oxygen. In contrast, chlorine leaves a chemical by-product called hypochloric acid and additional salts in water applications.  
How is ozone produced?
Ozone can be produced by ultraviolet (UV) light or by corona discharge (CD).  
How does ultraviolet light ozone generation work?
A special lamp gives off a specific wavelength of ultraviolet light which converts oxygen (O2) molecules into ozone (O3) molecules by splitting the oxygen molecules into individual oxygen atoms (O1) which then recombine with oxygen molecules to form ozone. This all occurs instantly inside the ozone chamber in the ozone generator.  
How does Corona Discharge Ozone Generation work?
Ozone is produced by passing air through a high voltage electrical discharge, or corona. A minimum of 5,000 volts of electricity is necessary to create the corona. Air or concentrated oxygen dried to a minimum of -60°C dewpoint passes through the corona which causes the O2 bond to split, freeing two O1 atoms which then collide with other O2 molecules to create ozone. The ozone/gas mixture discharged from the CD ozone generator normally contains from 1% to 3% ozone when using dry air, and from 3% to 6% ozone when using high purity oxygen as the feed gas.  
Will water temperature affect ozone?
Wide variations in pool water temperature will affect how well ozone works. An ozone generator should be designed and sized for maximum water temperatures and bather load.  
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