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Select your symptoms/environmental issue:

  • Sweating
  • Overheating
  • Dizziness
  • Headaches
  • Fatigue
  • Irritable
  • Trouble concentrating
  • Red heat rash
  • Lethargic
  • Dry eyes
  • Dry skin
  • Cracks in wooden furniture
  • Static electricity
  • Dry lips
  • Dry cough
  • Blocked nose
  • Dry airways
  • Cracks in wooden floor
  • Irritated skin
  • Tickly nose
  • Irritated eyes
  • Runny nose
  • Nauseous
  • Hayfever
  • Musty smell
  • Mould
  • Moisture
  • Asthma
  • Eczema
  • Dust mites
  • Chronic bronchitis
  • Common cold
  • Silverfish in house
  • Painful joints
  • Irritated airways
  • Cold hands and feet
  • Shivers
  • Chattering teeth

What is air quality?

Air quality is an indicator for the quality of air. Depending on the extent to which pollution sources are present in the air, a distinction can be made between clean and polluted air. Polluted air is caused by various pollution sources floating in the air. Due to the diversity of pollution sources, an air cleaner is relevant at different times. Whereas a person suffering from hay fever suffers primarily from pollution sources such as pollen in spring, this is less the case for a person suffering from asthma, depending on the season. But also people without allergies benefit from the use of an air purifier.

Particulate matter

Our air cleaners filter (fine) dust from a size of 2.5 microns (PM2.5). For reference: a fine particle is 1/30th of a human hair.


The pollen from flowers is spread by the wind and remains in the air. About 1 in 8 people are allergic to it.

Cooking odours

Although many people find the odours released during cooking to smell pleasant, the cooking fumes released during food preparation are actually harmful to inhale.

Dust mites

House dust mites are small spider-like animals that like to nestle in fabric products, such as upholstered furniture, curtains and bedding. The waste products of the house dust mite can cause allergic reactions.


Chemicals are chemicals found in many of our everyday products; think of cosmetics like perfume or deodorant, scented candles and cleaning products.

Pet dander

More than half of all families worldwide have a pet. What many people don’t know, however, is that floating hair and dander from our faithful four-legged friends can be harmful to our health.


Although we all recognise the harmful smell of smoke, smoke also has a negative impact on indoor air quality.


times more polluted indoor air


of our time is spent indoors


times a day we breathe


litres of air we breathe in daily

How do you measure air quality?

Because pollutant sources that cause polluted air are in most cases not visually perceptible – for reference, a fine particle is 1/30th of a human hair – a PM2.5 laser sensor is the most efficient way of measuring air quality. This sensor is built into Tube and Bright and measures the particulate matter in micrograms per cubic metre (µg/m³). If the value is between 0-20, the air quality in the room is excellent to good. With a value between 21-75, the air quality is moderately to moderately unhealthy. With a value between 76-999 the air quality is considered to be (very) unhealthy and in some cases even dangerous.

What do you notice about poor air quality?

Contrary to popular belief, polluted air is not only noticeable with asthma, allergies or hay fever. Health complaints such as tightness in the chest, dry skin, eyes or throat and headaches indicate that the air quality indoors is polluted.


When the air in a room is not sufficiently refreshed, CO2 and water vapour from our breathing (as well as pollution sources) increase. This lowers the oxygen level, which causes headaches.


When the air in a room is not sufficiently refreshed, CO2 and water vapour from our breathing (as well as pollution sources) increase. This lowers the oxygen level, which causes a low ability to concentrate.


When the air in a room is not sufficiently refreshed, CO2 and water vapour from our breathing (as well as pollution sources) increase. This lowers the oxygen level, which causes fatigue.

Shortness of breath

When pollution sources are inhaled, this can irritate the lungs, making breathing difficult. This can occur, for example, when inhaling chemicals such as paint, but also when inhaling sources of pollution that are more difficult to see.


When pollution sources are inhaled, they can irritate the airways, causing difficult breathing and/or irritation of the cavities and trachea.


As a natural reaction to inhaling pollutants that irritate the airways, you may start coughing. Coughing clears the lungs, windpipe and throat.


The quality of the air you breathe is logically related to allergic reactions. If the air quality is polluted, you may experience symptoms that make breathing difficult.

What to do about poor indoor air quality?

If you suffer from polluted air in your home, you can effectively improve it with the help of an air purifier. An air cleaner is a device that draws in air and filters out the sources of pollution using a multi-layer filter, after which clean air is blown into the room. During this process, negative ions are dispersed throughout the room; these ions attach themselves to fine dust particles so that these particles come down and can be sucked in by the air cleaner. The capacity of an air cleaner can be demonstrated using the Clean Air Delivery Rate (CADR). The CADR indicates how many cubic metres an air cleaner cleans per hour and depends on the power of the air cleaner and the type of filter.

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