How to find your Zehnder ventilation unit serial number

If your ComfoAir Flex unit does not have a green serial number sticker, you can locate the serial number on the type plate attached to the unit.

Steps to Locate the Serial Number

1. Open the unit’s front panel carefully so you can see the internal components.
2. Find the type plate
   The type plate is located on the left side of the unit’s interior, close to the electrical connections.
   You do not need to remove any internal parts to see it — just open the front panel and look for the plate.
3. Read the serial number on the type plate
   On the type plate, several information fields are shown, including:

1. Catalogue number

2. Serial number (the number required for service and registration)

4. Read the serial number exactly as it appears.

Notes

• The serial number is usually clearly labeled on the type plate.
• This method is intended for cases where the green sticker is missing.
• The serial number obtained here should be used for service requests, maintenance contracts, and MyZehnder Service Cloud entry.

If your ComfoAir E ventilation unit does not have a green serial number sticker, you can locate the serial number on the type plate mounted on the unit.

Step-by-Step Instructions

1. Locate the display unit on your ComfoAir E.
2. Find the type plate
   The type plate is on the right-hand side of the display (visible without removing major panels).

3. Read the information on the type plate
   The type plate shows at least the following items:

   1. Catalogue number

   2. Serial number (this is the number you need for service and registration)

4. Record the serial number exactly as shown on the type plate.

Notes

• The serial number may be labeled simply as “Serial number” on the plate.
• This method applies when a green sticker is not present.
• For service requests, maintenance contracts, or entry in the MyZehnder Service Cloud, the serial number from this type plate must be used.

If your ComfoAir 300 Standard or WHR-930 unit does not have a visible green serial number sticker, the serial number can be found on the type plate attached to the unit.

Step-by-Step Instructions

1. Locate the front of the unit.
   Find the area where the display and control panel are mounted.
2. Open the black flap on the front of the unit.
   Gently fold down the black access flap to reveal the internal section.
3. Remove the grey top cover above the flap (if present).
   The cover can be pulled forward toward you to expose the top section of the unit.
4. Find the type plate.
   The type plate is positioned under the mains power cable connection inside the unit.
   You may need to tilt your head slightly to see it clearly.

5. Read the serial number on the type plate.
   The type plate displays several identifiers, including:

   1. Catalogue number

   2. Serial number (usually labeled as “Serial-No.” or similar)

   Carefully read the serial number exactly as printed.

Notes

• The serial number may appear in one of several layouts depending on production year, but it will always be present on the type plate.
• This method applies when the green serial number sticker is missing.
• Use the serial number for service requests, maintenance contracts, and registration in the MyZehnder Service Cloud.

If your WHR 950 or WHR 960 unit does not have a green serial number sticker, you can find the serial number on the type plate attached to the unit.

Step-by-Step Instructions

1. Locate the front of the unit.
   Stand in front of the WHR 950 or WHR 960 ventilation unit.
2. Look on top of the front panel.
   The type plate is mounted on the top of the front of the unit housing — it is visible without removing covers or panels.

3. Read the information on the type plate.
   On the type plate you will find several details, including:

   1. Catalogue number (product number)

   2. Serial number (the number you need for service requests, registration, and maintenance) 

4. Record the serial number exactly as shown.
   Ensure you copy the exact characters from the plate.

Notes

• The serial number on the type plate can be used when the green sticker is missing.
• Always use the serial number shown on this type plate for service requests, MyZehnder Service Cloud entry, or maintenance contracts.

If your ComfoD 250 unit does not have a green serial number sticker, you can locate the serial number on the type plate attached to the unit.

Step-by-Step Instructions

1. Stand in front of the ComfoD 250 unit.
   You should be able to see at least one side of the housing where the display is located.
2. Locate the type plate on the side of the unit.
   The type plate is mounted on the side of the unit at the height of the display.

3. Read the information on the type plate.
   The type plate shows key device data, including:

   1. Catalogue number (product model/part number)

   2. Serial number (this is the number needed for service, warranty registration, MyZehnder Service Cloud, or maintenance contracts)

4. Copy the serial number exactly as it appears on the plate.
   Serial numbers are typically printed clearly and may be labeled as “Serial number” or a similar identifier.

Notes

• For the ComfoD 250, there are two possible type plate designs depending on the production year (older vs. newer), but the location remains the same.
• Always use the serial number from this plate when the green sticker is missing.
• This method ensures you correctly identify your unit for service requests, technical support, or maintenance agreements.

If your ComfoAir Compact ventilation unit does not have a green serial number sticker, you can still find the serial number on the unit’s type plate.

Step-by-Step Instructions

1. Stand in front of the ComfoAir Compact unit.
   Position yourself so you can clearly see the display area on the front of the unit.
2. Open the display flap.
   The display area of the ComfoAir Compact has a small cover or flap that protects the display and underlying information.
3. Look under the display flap.
   The type plate is located directly beneath the display flap.
4. Read the serial number on the type plate.
   The type plate contains important unit data, including the serial number.
   Ensure you copy the serial number exactly as shown, because this is required for service requests, registration, and maintenance contracts.

Notes

• The ComfoAir Compact type plate is not on the outside surface of the housing, but directly under the display flap.
• Always use this type plate serial number when the green sticker is missing.
• The serial number is typically clearly labeled on the plate.