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VUV ozone generators are used in swimming pools and spa applications ranging to millions of gallons of water. VUV ozone generators, unlike corona discharge generators, do not produce harmful nitrogen by-products and also unlike corona discharge systems, VUV ozone generators work extremely well in humid air environments.
Delivering ozone dissolved in liquids is not straight forward as ozone gas has limited solubility in water or oil. [15] When treating the water or other liquids themselves, the solubility is less of a problem as pure ozone gas can be discharged into the liquid until the desired effect is achieved. Charvet ozone generators in a laundry circa 1903
Ozone depletion, on the other hand, is a radiative forcing of the climate system. Two opposite effects exist: Reduced ozone causes the stratosphere to absorb less solar radiation, cooling it while warming the troposphere; as a result, the stratosphere emits less long-wave radiation downward, cooling the troposphere.
However, the required concentrations are sufficiently toxic to humans and animals that the U.S. FDA declares that ozone has no place in medical treatment [10] and has taken action against businesses that offer ozone generators or ozone therapy to consumers. [11] Ozone is a highly toxic and extremely reactive gas. [12]
They also emphasize that for ozone to be effective as a germicide, it must be present at concentrations far greater than can be safely tolerated by humans or other animals. [18] More recent reviews have highlighted that different routes of administration may result in different therapeutic and side-effect profiles. [19]
For seasonal affective disorder (SAD), a randomized controlled trial (RCT) comparing high (4.5x10 14 ions/second) and low (1.7x10 11 ions/second) flow rate negative air ionization with bright light therapy found that the post-treatment improvement percentage was 57.1% for bright light, 47.9% for high-density ions and 22.7% for low-density ions. [8]