The expert’s guide to filtration
Many people think of pollution as an outdoor problem, but the air inside our homes can be just as polluted, if not worse. We spend up to 90% of our time indoors, breathing in invisible particles such as dust, pollen and bacteria. Without proper ventilation and filtration, these pollutants linger, affecting our health, comfort, and overall well-being.
We at Zehnder know that a properly functioning ventilation system with high-quality filters is essential for keeping the air inside our homes fresh and clean. That’s why we feel that it’s important to share this information with our clients. How exactly does filtration improve air quality? What are the risks of poor filtration? And how do you ensure that your ventilation system is performing at its best? In this expert guide, we show you how to create a healthier indoor environment for you and your family.
We breathe around 20,000 times a day
Indoor air quality is 2-5 times worse than outdoor air
Due to poor ventilation, 20% of European homes suffer from mould
The air inside your home is filled with tiny pollutants, many of which are invisible to the naked eye. Some of the most common contaminants include fine dust, pollen, bacteria and volatile organic compounds (VOCs) released by furniture, paints, and cleaning products. While these pollutants may not always be noticeable, they can have a major impact on your health.
One of the biggest concerns is fine dust (PM2.5 and PM10), which is small enough to reach deep into the lungs when inhaled. These particles can come from traffic emissions, industrial pollution, and even the burning of wood or candles indoors. Pollen is another common indoor air pollutant. Even with closed windows, pollen can enter your home through ventilation systems and settle on surfaces. This can trigger allergies, respiratory problems, and irritation.
In addition to dust and pollen, many homes contain VOCs. These are gases emitted from building materials, paints, cleaning products, and even new furniture. These chemicals can cause headaches, eye irritation, and long-term health issues if ventilation is inadequate.
The key to cleaner indoor air is effective filtration. A standard filter captures larger particles, such as dust and hair, but let’s fine particles and gases pass through. This means that while the air may appear clean, harmful pollutants are still present. To truly improve indoor air quality, you need high-performance filters that can trap even the smallest particles. Read our Filter Magazine to learn more about the air quality in your home. (link here)
Zehnder’s filters are specifically designed to capture a wide range of pollutants. The efficiency of a filter is determined by its ePM rating, which indicates how much particulate matter it removes. See table below to see which filter has which rating. For example, an ePM1 filter captures at least 50% of PM1 particles, which include fine dust and harmful airborne pollutants. This level of filtration significantly improves the air you breathe, reducing allergy symptoms and improving overall health.
For homes affected by odours, smoke, or industrial pollution, a Fresh Scent filter is the best choice. This type of filter contains a layer of highly absorbent carbon, which traps gases and unpleasant smells, ensuring fresher, cleaner air.
Even the best filter needs to be replaced regularly to maintain its performance. One of the most common mistakes homeowners make is waiting too long to replace their filters. Over time, filters become clogged with dust and pollutants, reducing their ability to clean the air effectively. A clogged filter not only reduces air quality but can also lead to higher energy bills and system wear. When airflow is blocked, the ventilation system has to compensate by working at a higher speed, leading to increased noise levels and higher electricity consumption. This means that your system is not working optimal.
Want to know more about optimising your ventilation system? Check out our Filter Magazine
Replacing your filter at the right time ensures that your system continues to function efficiently and quietly, while also prolonging its lifespan. Zehnder recommends changing filters every six months to ensure optimal performance. To make this process easier, the Zehnder filter reminder service notifies you when it’s time for a replacement. This way, you never have to worry about forgetting to change your filter, and you can always enjoy fresh, clean air in your home.
Interested this service? Take a look on our filter reminder service page.
In this picture you can see a new, unused filter on the left and a filter that has been filtering for 3months on the right. This shows the importance of regularly replacing your filters te keep your air clean.
Good air quality is essential for a comfortable and healthy home. By choosing the right filters, replacing them on time, and maintaining proper ventilation, you can significantly improve the air you breathe. High-quality filters help protect against dust, pollen, allergens, and harmful pollutants, ensuring that your home remains a safe and fresh environment.
Zehnder’s expert-designed filters provide optimal performance and are tailored to different needs, whether you require protection against fine dust, pollen, or odours. With regular replacements and the right filtration system, you can enjoy better indoor air quality, lower energy consumption, and long-term well-being.
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