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What is ozone?

July 20, 2011
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Ozone generators have been used for years to eradicate odors in buildings after fires and natural disasters. Ozone is a gas, and it is very effective at eliminating odors. However, there are some concerns surrounding safety when using ozone. When using ozone, you must ensure there are no people or living things in the vehicle.

There are ozone kits specifically designed for use in automobiles. Typically, the unit sits on top of the car with a sealed hose placed inside the window. The system must run about 20 to 30 minutes to eliminate all interior organic odors.

Ozone is a gas. Its molecules consist of three oxygen atoms, designated by the chemical symbol O3. In nature, it is created by lightning in the lower atmosphere and by solar ultraviolet rays in the upper atmosphere. In an ozone generator, ozone is produced by applying an electrical current to a conductor sheathed in ceramic and encapsulated in a stainless steel tube. A corona is formed between the two conductors through the ceramic sheath. Oxygen (O2) molecules passing through the corona are split apart which then attach to other oxygen molecules forming ozone (O3).

When an O3 molecule encounters odor-producing molecules, it oxidizes the molecules, leaving only O2 molecules or pure oxygen. This simplified description of how ozone generators work explains how they kill odors.

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July 20, 2011
The description of ozone is correct and the system setup is also correct, however most new ozone generators manufactured now use strictly lamps to generate the ozone. I have worked with ozone in mold remediation and odors in housing and automobiles for 10 years and the systems manufactured for automotive use will not completly remove all types of odors within 20 -30 minutes. In order to ensure the removal of odors the system would have to be utilized for a minimum of 1 hour for minor odors, up to 8 hours for heavy odors. Also, to ensure odors are removed the automobiles inside air circulation would have to be periodically turned on to move the ozone into and out of the air conditioning / heating ducts. Heavy smoke odors or stale / musty odors are trapped in the AC / Heating system and unless ozone is circulated throughout the system odors will return. When ozone treatment is complete the vehicle needs to be vacuumed and wiped down and glass cleaned. The organic molecules attacked by the ozone, oxidize and and attach themselves to carpet, seats, plastics, and glass thus leaving residue. Ozone does leave a very pungent smell (which is clean oxygen)that customers may not like so it would not be a bad idea to use a non-fragrant deodorizer to cover the pure oxgen smell.