Windows and indoor air quality – what do you need to know?


Windows play a very important role in providing a healthy environment in our homes and workplaces. The indoor air quality, which is influenced by windows, is extremely important for our health and well-being.

By properly regulating airflow and the influx of natural light, windows can make a significant contribution to improving indoor conditions.

Want to learn more about how windows affect air quality? Read this article and take the first step to creating a healthy and comfortable environment in your home.

How do windows affect ventilation?

Windows are one of the main elements affecting ventilation in rooms. They allow the natural exchange of air, which is necessary to remove pollutants and moisture. Different types of windows – tilt, casement or sliding – offer different levels of ventilation efficiency. For example, tilt windows allow for gentle but continuous ventilation, while casement and sliding windows allow for rapid and intensive air exchange.

The choice of window type should therefore be a conscious decision, taking into account the ventilation needs of the room in question. In buildings where a constant exchange of air is required, such as in kitchens or bathrooms, windows with greater opening flexibility are preferred.

Remember that you can find models on the market that combine several different solutions, so you can benefit from both tilt and reveal options.

Impact of window seals and insulation on air quality

Window seals and insulation have a direct impact on indoor air quality. On the one hand, good sealing is essential to keep heat in and prevent energy loss. On the other hand, excessive insulation can lead to ventilation problems, resulting in the accumulation of dirt and moisture. This, in turn, can lead to mould growth and the development of what is known as Sick Building Syndrome (SBS), which is characterised by poor indoor air quality.

In modern construction, it is crucial to find a balance between energy efficiency and adequate air exchange. Therefore, it is important to include ventilation systems in the design and installation of windows that provide adequate air circulation while maintaining energy efficiency.

The importance of opening windows regularly

Opening windows regularly is a simple but effective way to improve indoor air quality. It is advisable to ventilate rooms several times a day to provide fresh air and remove accumulated pollutants. The optimum time for ventilating is a few minutes, especially during the day when the temperature difference between inside and outside is not too great.

Cross ventilation, which involves opening windows on opposite sides of the building, is also an effective method. This creates an airflow that effectively exchanges polluted air for fresh air. This simple practice is particularly important in highly insulated buildings where natural air exchange is relatively limited.

Modern window solutions for better air quality

Today’s technologies offer advanced solutions that can significantly improve indoor air quality without sacrificing energy efficiency. One such solution is windows with micro-ventilation. They allow for minimal, controlled opening, which enables a continuous supply of fresh air without significant heat loss.

Another innovation is intelligent window systems that can automatically regulate the degree of opening depending on set parameters – temperature, humidity or CO2 levels in the room. Such systems can also be integrated into home building management systems, offering optimised air quality while being energy efficient.

Modern solutions are the perfect complement to traditional ventilation methods, allowing a healthy and comfortable indoor environment to be maintained with minimal user effort.

External factors affecting air quality

Indoor air quality is also closely linked to external factors. The location of the building is crucial – buildings located in areas with high air pollution (city centres or proximity to industrial plants), may require additional protection measures, such as air filters.

The time of year also affects indoor air quality. For example, during the winter months, when windows are opened less frequently, more frequent ventilation may be necessary to prevent the build-up of pollutants. During periods of high allergen concentration, it may be particularly important (especially for allergy sufferers) to use appropriate filters in ventilation systems.

Strategies to minimise the negative impact of external influences range from the appropriate design and positioning of windows to the use of additional technical solutions. It is important to consider these aspects as early as the design stage of a building to ensure optimal indoor air quality.

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