ComfoAir 350, ComfoD 350

Filter Replacement Guide – Zehnder ComfoAir ComfoAir 350, ComfoD 350

1. Switch off the unit
   Turn off the ventilation unit.
   → The fans will stop completely.

2. Open the filter covers
   Open the filter covers to access the filter compartments.

3. Remove the old filters
   Carefully pull the used filter inserts out of the slots.

4. Clean the filter frames and insert new filters

   • Open the reusable filter frames.
   • Remove the used filter inserts.
   • Clean the filter frames if necessary, e.g., by vacuuming or wiping with a dry cloth.
   • Place the new filter inserts into the frame.
   • Close the filter frame securely.

   ⚠️ Always use original Zehnder filters to ensure proper operation of the unit.

   ℹ️ Recommendation: Check and replace the filters every 3–6 months, depending on operating conditions.

5. Close the filter covers
   Reattach the filter covers and ensure they snap into plac

Zehnder ComfoAir ComfoAir 350, ComfoD 350

• Comfort ventilation for demands up to 370 m³/h
• Heat recovery with an efficiency of more than 90%
• Low power consumption thanks to DC motors
• Automatic 100% summer bypass
• Frost protection function: efficient even at low temperatures
• Quick, safe installation and servicing
• Integrated preheater and humidity control (optional)
• Wireless remote control and filter replacement indicator
• Geothermal heat exchanger control
• Low minimum air volume, specially designed for single family houses
• Digital Ease or Luxe control unit
• Passivhaus Institut accredited