Two people carry out a quality test and tick off a questionnaire

Our opinions on air purifiers

Owning an air purifier is a great way to clean up the atmosphere in your home. By neutralising airborne pollutants, you can protect the health of your family, from newborns to adults, and improve your overall indoor comfort.

However, it is not easy to make the right choice among all the models of air purifiers, because not all of them are necessarily adapted to the pollution you wish to eliminate. Here are our tips to help you make the right choice.

Comparison table and opinion

Owning an air purifier is an effective way to protect your health and the health of your family. It reduces the risk of allergies and asthma and prevents carcinogens from entering deep into your lungs. But do you know what makes each device different?

How does an air purifier work?

The air purifier is a device that absorbs the atmosphere in the room and then releases it in a purified state after removing polluting particles. During its treatment, the air passes through several filters, namely :

  • A pre-filter to retain the thicker particles.
  • A HEPA filter to capture ultrafine particles as small as 0.3 microns.
  • A active charcoal filterThis is usually the last step in the air pollution control cycle. It traps gases, odours, cigarette smoke and some volatile organic compounds.

Some purifiers also use the ultraviolet light (UV-C) or ionisation to purify the air in the room. UV light inactivates viruses and bacteria, while ionisation causes the particles to fall to the ground (the purifier emits negative ions, which attach themselves to the polluting particles and weigh them down).

To breathe clean air, we believe your air purifier should :

Capturing fine particles and airborne pollen

These particles come from heating, dust, mould spores, pollen, animal hair and other allergens. A purifier with a HEPA filter will be able to neutralise fine particles in the airThe HEPA filter is a simple but extremely effective filter, which is why most air cleaners on the market are now equipped with a high level of filtration of pollutants, whether smoke or odours. It is simple to operate, but extremely effective, which is why the HEPA filter is now found in most air purifiers on the market, as its level of filtration of pollutants is particularly high.

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Controlling airborne chemicals (VOCs), fines and pollens

The products we use every day at home emit volatile organic compounds (VOCs). Perfume, household products, paint, but also the formaldehyde present in cigarette smoke...

A ionizer purifier is able to bring down polluted particles to the ground in your car or home. All you have to do is vacuum them up before they fly away again.

Another solution to neutralise this pollution is to use a device with an activated carbon filter. Unlike particles, the molecules in gases, odours and VOCs are not solid and can pass through HEPA filters. An activated carbon filter is able to remove the polluted air molecules on contact with it because they are adsorbed, which means that they chemically bind to the large surface of the carbon.

Inactivate viruses and bacteria

Some air purifiers can destroy germs, mould spores, bacteria and even viruses. Under the effect of germicidal ultraviolet irradiation, bacteria cells and viruses die out because they can no longer function. This is called programmed cell death or apoptosis.

Purify the air with a UV-C light filter is not instantaneous. Bacteria and viruses must be exposed to UV light for a minimum period of time before they are rendered harmless. On the other hand, ultraviolet light can generate ozone, which is a gas that is harmful to your lungs. You will need to choosing your air purifier If you choose this technology, it should not emit ozone.

The 7 main signs of polluted indoor air

The Daily | Should I invest in an air purifier?

We often hear about air pollution and fine particles, but household pollution is of a different nature. While some particles such as dust are visible, others are more insidious, as they are invisible to the naked eye.

Here are 7 signs that will let you know if it's time to get an air purifier.

1. Cold symptoms that don't go away

Poor air quality can cause many symptoms, often mistaken for a cold or flu. If these symptoms do not disappear after a week or two, then it may not be a virus. If you find that you are symptomatic at home, but feel better at work, poor air quality may be the cause of your symptoms.

2. Difficult or inadequate sleep

Polluted air has a direct impact on our healthThis includes the quality and duration of our sleep. According to one study, people living in a highly contaminated area are up to 60 % more likely to have poor sleep.

While all pollutants can affect your sleep, some are more disruptive than others. Equipping yourself or your baby with an air purifier will help you to remove :

  • Allergens A healthy sleep cycle consists of periods of deep breathing, which can be disturbed by reactogens such as dust, dust mites, animal dander and mould spores.
  • Volatile organic compounds (VOCs) Inhalation of these pollutants affects the central nervous system and can lead to respiratory problems, including sleep apnoea.
Tired businesswoman sleeping on a table in the office

3. Worsening of allergies or asthma

If your allergies or asthma are getting worse when you are at home, it is likely that your air quality is poor. Getting an air purifier to prevent hypersensitivity can be a good idea, as there are many pollutants that can exacerbate your symptoms:

  • Pollen With rising temperatures and increasing CO2 (carbon dioxide) levels, the intensity and duration of the pollination period has increased. During this period, if pollen gets into your home, your breathing may be affected.
  • Household dust It is a mixture of dead skin cells, hair, bacteria, etc. If you find that your allergies or asthma episodes are worse at home, it is likely that you have high levels of dust.
  • Cigarette smoke Smoking is a major cause of allergy and asthma symptoms. If you are/are living with a smoker, there is a good chance that your air quality will be compromised.
  • Mould spores These are present both indoors and outdoors, mould spores are so small that they can get in anywhere. The increase in your allergy or asthma symptoms is often linked to an increase in mould spores in the air.

4. Unpleasant odours

Person smoking a cigarette at home in front of their laptop

Many of the common odours found in our homes are actually airborne chemicals. Some VOCs, such as formaldehyde, can be particularly harmful to our health and some scents can cause headaches, dizziness or nausea.

If a scent takes hold in your home or comes back often, it can affect your mood and stress levels. Persistent odours are a clear indication that it is time to take action to improve the quality of your indoor atmosphere.

5. Too much or too little humidity

Ideally, every room in your home should have a humidity level of between 30 and 50 %. Too much humidity can lead to mould infestations and poor sleep, while too little humidity can lead to dry skin and nosebleeds. It is important to maintain the right humidity level in your home.

6. Moulds

The presence of mould is a clear sign of deteriorating air quality. Homes with warm, damp rooms are particularly susceptible to micromycete infestations. Mould is associated with allergic reactions and asthma.

7. Hot and cold draughts

If the temperature is different in different rooms, it is likely that your heating system, ventilation system or insulation is poorly maintained. This may be a sign that some areas of your home contain more pollutants than others.