Tag "indoor air quality"
Foggy windows, high humidity or mold in homes with an AHU or MVHR system? Learn why this happens and how to fix it – from airflow adjustments to filter checks.
Do you remember that feeling in the classroom when there was no ventilation – the air became heavy and stuffy, and you’d end up with a headache after lessons? The same thing happens at home if not enough fresh air gets in.
September is a transitional month when sharp temperature and humidity fluctuations create additional challenges for your ventilation system. During the day the air is still warm, while at night it becomes much cooler. Improperly adjusted ventilation can lead to discomfort, condensation, or even mold risk.
Most people replace filters only when they become visibly dirty. However, even a filter that looks “still usable” may already fail to clean the air properly. Sometimes people try shaking, vacuuming, or blowing through the filter – but that only helps for a short while. Why is that, and what is the real difference between old and new filters?
Many wonder if turning off their heat recovery ventilator (HRV) during summer saves energy. While it might seem logical since heating isn’t needed, modern HRV systems with summer modes use minimal electricity and provide significant benefits. Keeping your HRV running ensures cleaner, healthier air by filtering out dust, pollen, and bugs, reduces noise compared to open windows, improves ventilation in windowless rooms, enhances security, and even offers night cooling. Overall, running your HRV year-round is a smart choice for comfort, air quality, and safety.
Filters in the ePM10 class must capture at least 50% of PM10 particles (0.3–10 μm) during testing. For instance, a filter rated as ePM10 55% captures more than 55% of PM10 particles. The term "ePM" stands for Efficiency of Particulate Matter.
These filters are especially useful in areas with high PM10 pollution and can trap allergens like pollen, improving indoor air quality.
Filters in the ePM1 class must capture at least 50% of PM1 particles (0.3–1 μm) during testing. For example, a filter rated as ePM1 70% captures more than 70% of PM1 particles. The term ePM stands for Efficiency of Particulate Matter.
These filters effectively remove fine solid particles, ensuring healthier indoor air. They are the most efficient filters in the ISO 16890 classification.
An M5 filter helps protect your ventilation system—especially the heat exchanger—from clogging, while also filtering out PM10 particles common in many European cities. Positioned between G4 and F7 filters, the M5 offers more effective filtration than G4 with lower energy use and a longer lifespan than F7.
Filters are classified by how well they trap particles, and F7 filters fall into the "fine filtration" category. These filters capture small particles (0.3-1 μm) to help maintain good indoor air quality, even in highly polluted areas.