A modern comfort ventilation system not only ensures fresh air in your home but also supports a healthy and pleasant indoor climate. At the heart of every ventilation system is the right filter. But not all filters are the same. Depending on the area of use, living situation, or individual sensitivities, various types of filters are available. In this article, we take a close look at the differences between system protection filters, hygiene filters, Zehnder pollen filters, and Zehnder activated carbon filters, and explain when each type is most suitable. We also highlight the difference between filters for ventilation units and filters for ventilation tubes.

1. Zehnder System Protection Filters – The Foundation of Every Operation

System protection filters are the basic equipment of any ventilation unit. Their primary function is to protect the unit itself from contamination by coarse particles such as dust, insects, or pollen. Their role is less about optimizing indoor air quality and more about ensuring the value retention and longevity of the ventilation system.

Recommended Use: In households without special sensitivities, as standard protection for the ventilation system. Essential in every setup.

2. Zehnder Hygiene Filters – For Clean and Safe Air

Hygiene filters – also known as fine dust or ePM1 filters – remove particularly fine particles from the air, including fine dust, mold and bacteria. They comply with the ISO 16890 filter standard and make a significant contribution to maintaining high hygiene levels at home.

Recommended Use: In households with small children, elderly individuals, or people with respiratory illnesses. Ideal in urban areas with high levels of fine dust.

3. Zehnder Pollen Filters – A Must for Allergy Sufferers

Zehnder pollen filters are specifically designed to remove pollen and other allergens from the supply air. They significantly improve the quality of life for allergy sufferers by effectively keeping allergy-triggering particles out of the indoor air.

Recommended Use: For anyone suffering from hay fever or other pollen allergies. Especially helpful during spring and summer.

4. Zehnder Fresh Scent Filters – Activated Carbon Filters Against Odors and Pollutants

Zehnder activated carbon filters consist of porous carbon capable of absorbing gases, odors, and volatile organic compounds (VOCs). They neutralize unpleasant kitchen smells, tobacco smoke, or exhaust fumes and sustainably improve air quality.

Recommended Use: In households near roads, industrial areas, or with frequent odor exposure. Also ideal for open-plan kitchens and living areas.

Filters in Ventilation Units and Filters in Ventilation tubes

Not only the type of filter but also its placement plays an important role. A basic distinction is made between filters in the ventilation unit and filters in the ventilation tubes.

Filters in the Ventilation Unit

These filters are an integral part of the unit and easily accessible for regular replacement. They purify the incoming and outgoing air directly at the central point of the system. Depending on the filter type (system protection, hygiene, Zehnder pollen filters, or Zehnder activated carbon filters), functionality can be tailored to meet the residents’ needs.

• Easy access
• Direct protection for the unit
• Centralized filtration for optimal air distribution

Filters fore Ventilation Tubes

These filters are located decentrally in the air distribution system, such as near air outlets, and serve to filter specific rooms downstream or to prevent dirt buildup in the ductwork. They complement the main filters in the unit.

• Additional protection for ventilation system
• Filters for exhaust air and supply air
• Custom room-by-room solutions

Choosing the Right Filter – A Quick Guide

Conclusion: Tailored Solutions Matter

Choosing the right filter depends greatly on individual needs and living conditions. While the system protection filter should always be present, the specialized filters offer targeted air optimization – whether to reduce allergy symptoms, improve hygiene, or neutralize odors.

It’s also important to follow the recommended replacement frequency: Zehnder advises replacing filters every six months, with a visual inspection after around twelve weeks. This ensures that filters can deliver their full potential – for consistently clean, fresh, and healthy air.

For peace of mind, it’s best to use original filters from Zehnder Group, which are perfectly matched to each unit and meet high standards of fit, airflow, and efficiency.

A convenient filter subscription also ensures that the right filter types arrive at your doorstep at the right time – easy, reliable, and efficient, for fresh air every day.