The impact of poor air quality

Air quality simply means the quality of the air we breathe. This is determined by the amount and type of substances it contains and the extent to which it may be harmful to humans, animals and the environment. Examples of these substances include carbon dioxide (CO2), nitrogen dioxide (NO2), volatile organic compounds (VOCs) and particulate matter (such as PM1, PM2.5 and PM10), as well as biological particles such as pollen, fungi and bacteria. In addition, factors such as temperature, humidity and ventilation affect air quality, especially indoors.

Air is everywhere, and therefore it’s impossible to keep outdoor air from entering indoors. And that's just as well. However, this means that environmental factors directly affect air quality in homes, schools, offices and other buildings. Examples include traffic, industry and agriculture, which release (harmful) substances into the air. Add in internal sources of pollution, such as the presence of people, cooking, showering and (industrial) processes, and the message is clear: air quality is constantly threatened. Without proper ventilation, this pollution can accumulate unnoticed, with dire consequences.

Long-term exposure to certain substances can have consequences ranging from mild to serious. For instance, excess CO2 leads to fatigue and concentration problems, and particulate matter is the cause of symptoms such as coughing and shortness of breath. Other complaints can arise such as headaches (due to CO), eyes, nose and throat irritation (due to VOCs) or allergies, respiratory infections and asthma attacks (due to pollen, mould or bacteria). At worst, certain substances can even lead to lung diseases, cardiovascular disease and cancer. However, polluted air does not only affect our health. Buildings are also impacted: installations get contaminated, moisture causes mould and structures and materials wear out faster.

Increasing awareness of the importance of clean air has led to ever more stringent air quality requirements. Especially now that homes and buildings are becoming better insulated. As this limits natural ventilation, a mechanical ventilation system is needed to ensure an optimal indoor climate. This type of system carries out polluted air and brings in fresh air to keep the air quality consistent. And if you opt for a demand-controlled system or a unit with heat recovery, the end user not only benefits from a sustainable, healthy and comfortable indoor climate but also lower energy costs.