How to find your Zehnder ventilation unit serial number

How to Find the Serial Number on a Zehnder ComfoAir Flex 250 / 350

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:

• Catalogue number

• Serial number (the number required for service and registration)

  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.

How to Find the Serial Number on a Zehnder ComfoAir E

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:
   • Catalogue number
   • 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.

How to Find the Serial Number on a Zehnder ComfoAir 300 Standard / WHR-930

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:

   Catalogue number

   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.

How to Find the Serial Number on a Zehnder WHR 950 / WHR 960

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:

   Catalogue number (product number)

   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.