How to change your ventilation unit filters?
11 August 2025
Filter replacement 🔄 – a simple task you can easily do yourself. Just follow this quick guide:
✅ 1. Switch off the unit
- Stop the ventilation via the app or remote control.
- Wait until the fan has completely stopped.
- For best safety – disconnect the unit from the mains.
❌ Do not touch the electric heater – it may be hot!
✅ 2. Open the filter cover
On most ventilation units the cover can be opened without tools. If needed, undo a few screws.
✅ 3. Remove the old filters
- Note their position and the direction of the airflow arrow.
- If there are no markings – add your own labels.
- If possible – vacuum the inside of the unit to remove dust.
✅ 4. Insert the new filters
- Follow the airflow direction (arrow on the filter).
- Manufacturers usually indicate airflow direction and filter slots inside the ventilation unit and near the ducts – check these markings.
- Supply air filter – usually class F7–F9 or carbon, fitted at the insulated duct.
- Extract air filter – simpler (usually class G3, G4 or M5), fitted at the uninsulated duct.
✅ 5. Close the cover and switch back on
- Switch the unit back on.
- Reset the filter timer.
💡 Changing filters for the first time? Check the user manual (you can easily find it online).
👉 Quick video guide