Zehnder HRV Filters

Zehnder HRV filters are exact-fit replacement filter sets for selected Zehnder ComfoAir heat recovery units. Designed for a secure fit and stable airflow, these filters help protect the heat exchanger and support cleaner indoor air.

Our Zehnder-compatible filters are made in Lithuania and supplied as practical two-filter sets for supply and extract air. Browse all HRV / recuperator filters, see delivery & shipping, or contact us if you need help choosing the right set.

Zehnder filters for ComfoAir E and Q units

This category includes replacement filter sets for ComfoAir E300, ComfoAir E400, ComfoAir Q350, ComfoAir Q450, and ComfoAir Q600. Both currently listed sets use the same filter size: 500×156×22 mm. Always match the exact unit model before ordering.

G4 or F7: which Zehnder filter option should you choose?

• G4 + G4 – standard set for balanced everyday filtration of supply and extract air.
• F7 + G4 – more efficient set for finer particle filtration on the supply air side.

F7 is the better choice for urban environments, allergy-sensitive homes, or when cleaner incoming air is the priority. G4 remains a practical option for everyday ventilation system protection.

Why exact fit matters

A filter that is too small may allow bypass air, while a filter that is too large may not fit or seal correctly. Exact dimensions help maintain airflow, reduce unnecessary fan strain, and support reliable filtration performance over time.

How often should you replace Zehnder HRV filters?

A practical replacement interval is 2–3 times per year. More frequent replacement may be beneficial in dusty areas or where outdoor air quality is poorer.

Shipping across Europe

Filters1.eu ships across Europe. Shipping cost is calculated at checkout by destination country. If you are unsure which Zehnder filter set you need, contact us with your unit model or a photo of the unit plate and we’ll help you match the correct set.