Cold and flu season often starts indoors — not outside. While filters in your ventilation unit can’t trap viruses themselves, proper air exchange, high-efficiency filters and balanced humidity greatly reduce the risk of infection and keep your home air cleaner and healthier.

Manufacturers recommend changing them every 6 months under normal conditions, or every 4 months in polluted areas. Learn the key signs that your filter is clogged and how to choose the right replacement interval.

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.

Properly maintained filters are essential to ensure you always breathe clean air at home. Changing the filters isn’t difficult – you just need to follow a few simple steps.

Regular filter replacement is essential to maintain the efficiency of your MVHR (Mechanical Ventilation with Heat Recovery) unit, reduce energy consumption, and extend the life of your ventilation system. While changing filters is a simple task, manufacturers often provide only basic instructions, leading to common mistakes. 

Coarse filters capture larger particles like dust and sand while ensuring low airflow resistance, quieter operation, and energy efficiency. Ideal for ventilation systems, they extend filter lifespan and protect HVAC components. CleanFilter Coarse filters offer premium materials, high dust-holding capacity, and certified performance for cleaner indoor air.

G4 filters are effective at trapping medium-sized dust particles, sand, insects, lint, and even some larger pollen particles. They provide sufficient filtration to keep ventilation systems running smoothly and cleanly.

Original filters aren’t always better. Most ventilation unit (AHU) brands buy filters from specialized manufacturers, so “original” often means a label rather than superior quality. What matters is proven performance to ISO 16890, high-quality PFAS-free filter media from Sandler AG, VDI 6022 hygiene compliance, airtight construction, and clear EU origin. CleanFilter analogue filters often match or outperform originals, cost 2–3 times less, and are used as “original” filters by several manufacturers.