Air Purifier Smells Like Ozone

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ozone scented air purifier

Do you notice a strange odor coming from your air purifier? It may smell like ozone. But what causes this smell? Is it harmful? How does an air purifier produce ozone?

In this article, we'll delve into the reasons behind the ozone-like smell, explore its potential risks, and provide tips to reduce the odor. Additionally, we'll discuss alternative air purifiers that don't emit ozone.

Stay informed and find the best solution for clean air in your home.

Key Takeaways

  • Ozone-like smell in air purifiers can be caused by the presence of ozone-producing components.
  • High levels of ozone emitted by air purifiers can be harmful, especially for individuals with respiratory conditions.
  • Prolonged exposure to high levels of ozone can lead to lung damage and worsen existing respiratory conditions.
  • It is important to choose an air purifier that does not emit high levels of ozone and to follow manufacturer instructions for reducing ozone smell.

What Causes the Ozone-Like Smell

If your air purifier smells like ozone, it may be due to the presence of ozone-producing components in the device. Ozone is a molecule composed of three oxygen atoms, and it has a distinct smell that's often described as pungent or metallic.

Some air purifiers are designed to produce ozone as a means of neutralizing odors or killing bacteria and other microorganisms in the air. These purifiers typically contain ozone generators, which are devices that emit ozone gas into the surrounding air.

When ozone is present in the air, it can react with various pollutants and organic compounds, breaking them down and reducing their concentration. However, the release of ozone into the air can also lead to an ozone-like smell, which some people find unpleasant or irritating.

It's important to note that high levels of ozone can be harmful to human health, particularly for individuals with respiratory conditions or sensitivities. If you find the ozone-like smell from your air purifier bothersome, it may be advisable to switch to a purifier that doesn't produce ozone or to ensure that the ozone-producing components are turned off.

Is the Smell of Ozone Harmful

The smell of ozone emitted by an air purifier can be harmful to your health. Ozone is a molecule composed of three oxygen atoms, and it has a distinct odor that can be detected even at low concentrations. While ozone is commonly associated with clean, fresh air after a thunderstorm, prolonged exposure to elevated levels of ozone can have adverse effects on your respiratory system.

Here are some reasons why the smell of ozone emitted by an air purifier can be harmful:

  • Ozone irritates the respiratory system: Breathing in ozone can cause irritation and inflammation of the airways. This can lead to symptoms such as coughing, wheezing, and shortness of breath.
  • Ozone can worsen existing respiratory conditions: Individuals with asthma, chronic obstructive pulmonary disease (COPD), or other respiratory conditions may experience exacerbated symptoms when exposed to ozone.
  • Ozone can cause lung damage: Prolonged exposure to high levels of ozone can lead to lung tissue damage and reduce lung function over time.
  • Ozone can react with other pollutants: Ozone can react with other chemicals, such as volatile organic compounds (VOCs), found in indoor environments. This chemical reaction can produce harmful byproducts, including formaldehyde and ultrafine particles, which can further worsen indoor air quality.

To protect your health, it's important to ensure that the air purifier you're using doesn't emit high levels of ozone. Look for air purifiers that are certified as ozone-free by reputable organizations. If you notice a strong smell of ozone coming from your air purifier, it's recommended to turn it off and consider alternative options for improving indoor air quality.

How Does an Air Purifier Produce Ozone

Air purifiers produce ozone over time as a byproduct of their operation. Ozone is a molecule composed of three oxygen atoms (O3). This process is known as ozone generation and is typically achieved using one of two methods: corona discharge or ultraviolet (UV) light.

In corona discharge, a high voltage electrical field is created between two electrodes, causing oxygen molecules (O2) to split into individual oxygen atoms. These atoms then react with other oxygen molecules, forming ozone.

The UV light method involves the use of ultraviolet lamps that emit a specific wavelength of light. When oxygen molecules pass through this UV light, they're broken apart, and ozone is formed.

It's important to note that not all air purifiers produce ozone. Some models are specifically designed to produce ozone as their primary function, such as ozone generators. However, most standard air purifiers on the market today aren't intended to generate ozone, but rather to remove airborne pollutants using filters or other technologies.

Tips to Reduce Ozone Smell From Air Purifiers

To reduce the ozone smell from your air purifier, try using a carbon filter. Carbon filters are effective at removing odors from the air, including the ozone smell produced by some air purifiers. Here are a few tips to help you reduce the ozone smell from your air purifier:

  • Install a carbon filter: A carbon filter can help absorb and neutralize the ozone molecules in the air, reducing the smell. Make sure to choose a carbon filter that's compatible with your air purifier model.
  • Adjust the ozone output: Some air purifiers have adjustable ozone output settings. Lowering the ozone output can help reduce the smell. Refer to the user manual or contact the manufacturer for instructions on adjusting the ozone output.
  • Increase ventilation: Improving ventilation in the room where the air purifier is located can help dissipate the ozone smell. Open windows or use fans to increase air circulation.
  • Run the air purifier in a well-ventilated area: If possible, place the air purifier in a well-ventilated area, such as near an open window. This allows the ozone to disperse more easily, reducing the smell.

Alternative Air Purifiers Without Ozone Emission

If you're concerned about the ozone smell from your air purifier, there are alternative options available that don't emit ozone. Ozone-free air purifiers are designed to effectively clean the air without producing harmful ozone gas. These air purifiers use different technologies to remove pollutants from the air, such as activated carbon filters, HEPA filters, or electrostatic precipitators.

Activated carbon filters are effective at removing odors, gases, and volatile organic compounds (VOCs) from the air. These filters work by adsorbing the pollutants onto the carbon surface.

HEPA filters, on the other hand, can capture particles as small as 0.3 microns with an efficiency of 99.97%. They're highly efficient at removing allergens, dust, pet dander, and pollen from the air.

Electrostatic precipitators use an electrostatic charge to trap particles in the air. These devices charge the particles, causing them to stick to oppositely charged plates or filters. This technology is effective at removing larger particles from the air.

When choosing an ozone-free air purifier, it's important to consider the size of the room you want to purify, the specific pollutants you want to remove, and the maintenance requirements of the device. Additionally, look for air purifiers that are certified by reputable organizations such as the Association of Home Appliance Manufacturers (AHAM) or the California Air Resources Board (CARB) to ensure their effectiveness and safety.


In conclusion, the ozone-like smell produced by air purifiers is caused by ozone emissions, which can be harmful to human health.

It's important to consider alternative air purifiers that don't emit ozone to ensure a safe and odor-free environment.

By following the tips provided, individuals can effectively reduce or eliminate the ozone smell from their air purifiers, promoting a healthier living space.

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I am Ahmad Yar, an air purification expert specializing in all aspects of creating a healthier and cleaner environment.

If you would like to learn more about me check the about page here.

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