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  • Wolf CWL-F/T-300 Excellent filter set G4+G4 (house brand)
    House brand
    (0)
    Extract filter size: 245x177x5 mm
    Supply filter size: 245x177x5 mm
    Efficiency (EN779): G4+G4
    Quantity: 2 filters
    Protection level

    Filter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.

    Basic

    Basic protects from basic stuff

    8,91 8,91 

    Price for set

    Shipping: within 24 hours
    1
    Cashback reward  - 
    Earn 21 points
  • Wolf CWL-F/T-300 Excellent filter set G4+F7 (house brand)
    House brand
    (0)
    Extract filter size: 245x177x5 mm
    Supply filter size: 234x166x20 mm
    Efficiency (EN779): G4+F7
    Quantity: 2 filters
    Protection level

    Filter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.

    Basic

    Basic protects from basic stuff

    Smog and pollen

    Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen

    20,90 20,90 

    Price for set

    Shipping: within 24 hours
    1
    Cashback reward  - 
    Earn 51 points
  • Wolf CWL-F-150 Excellent filter set G4+G4 (house brand)
    House brand
    (0)
    Extract filter size: 175x143x5 mm
    Supply filter size: 175x143x5 mm
    Efficiency (EN779): G4+G4
    Quantity: 2 filters
    Protection level

    Filter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.

    Basic

    Basic protects from basic stuff

    8,91 8,91 

    Price for set

    Shipping: within 24 hours
    1
    Cashback reward  - 
    Earn 21 points
  • Wolf CWL-F-150 Excellent filter set G4+F7 (house brand)
    House brand
    (0)
    Extract filter size: 175x143x5 mm
    Supply filter size: 164x132x20 mm
    Efficiency (EN779): G4+F7
    Quantity: 2 filters
    Protection level

    Filter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.

    Basic

    Basic protects from basic stuff

    Smog and pollen

    Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen

    19,90 19,90 

    Price for set

    Shipping: within 24 hours
    1
    Cashback reward  - 
    Earn 48 points
  • Wolf CWL-300/400 Excellent filter set G3+G3 (house brand)
    House brand
    (0)
    Extract filter size: 525x185x5 mm
    Supply filter size: 525x185x5 mm
    Efficiency (EN779): G3+G3
    Quantity: 2 filters
    Protection level

    Filter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.

    Basic

    Basic protects from basic stuff

    10,90 10,90 

    Price for set

    Shipping: within 24 hours
    1
    Cashback reward  - 
    Earn 27 points
  • Wolf CWL-300/400 Excellent filter set G3+F7 (house brand)
    House brand
    (0)
    Extract filter size: 525x185x5 mm
    Supply filter size: 525x185x24 mm
    Efficiency (EN779): G3+F7
    Quantity: 2 filters
    Protection level

    Filter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.

    Basic

    Basic protects from basic stuff

    Smog and pollen

    Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen

    25,89 25,89 

    Price for set

    Shipping: within 24 hours
    1
    Cashback reward  - 
    Earn 63 points
  • Wolf CWL-180 filter set G3+G3 (house brand)
    House brand
    (0)
    Extract filter size: 290x136x5 mm
    Supply filter size: 290x136x5 mm
    Efficiency (EN779): G3+G3
    Quantity: 2 filters
    Protection level

    Filter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.

    Basic

    Basic protects from basic stuff

    10,90 10,90 

    Price for set

    Shipping: within 24 hours
    1
    Cashback reward  - 
    Earn 27 points
  • Wolf CWL-180 filter set G3+M6 (house brand)
    House brand
    (0)
    Extract filter size: 290x136x5 mm
    Supply filter size: 290x136x25 mm
    Efficiency (EN779): G3+M6
    Quantity: 2 filters
    Protection level

    Filter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.

    Basic

    Basic protects from basic stuff

    Smog and pollen

    Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen

    24,90 24,90 

    Price for set

    Shipping: within 24 hours
    1
    Cashback reward  - 
    Earn 60 points
1-8 of 8

Frequently Asked Questions

Frequently asked questions ordered by popularity.

What is the difference between G4, M5, F7, etc. class filters? Plus icon Close icon

Filter class refers to the size and amount of particles a filter can trap. The higher the classification, the more effectively the filter removes particles from the air.

For incoming outdoor air, it’s generally recommended to use higher-class filters. However, we always suggest following the manufacturer’s guidance and using the specific filter sets outlined in your unit’s eco-commissioning documentation.

For more information, take a look at our comprehensive guide to filter classes for heat recovery units.

How often do I need to change the filters in my HRV? Plus icon Close icon
It is recommended to change the filters in your HRV every 3 to 6 months, depending on how dirty they become. However, the key signs that your filters need replacing include:
– An increase in noise from the HRV
– A reduction in the amount of air being supplied or extracted
Smart HRVs with an electronic control panel and display screen show the volume of air supplied and extracted per hour.
For example, if a Zehnder ComfoAir Q350 HRV in a 140m² home operates at an optimal rate of 190m³ per hour but drops to 150–170m³, the filters should be replaced.
How do I change the filter on my recuperator? Plus icon Close icon
Changing the filters is simple. Follow these steps:
1. Switch off the unit and open the dampers.
2. Remove the old filters and insert the new ones.
3. Close the dampers and restart the recuperator.
The most important thing is to ensure you buy the correct filter for your recuperator. To do this, select your recuperator’s manufacturer from our catalogue, then choose the specific model.
Our system will recommend the right filters for you. Simply place your order, replace the filter, and enjoy clean, fresh air once again.
How do I find the model name and number of my recuperator? Plus icon Close icon
There are several ways to identify the manufacturer and model of your recuperator:
1. Check the label on the unit itself, which usually displays the manufacturer and model number.
2. Contact your installer or the developer/builder of your property for details.
3. Measure the width, length, and height of the filter, then use these measurements to browse our online shop. Our system will suggest the correct recuperator filters for your unit.
4. If none of the above help, please get in touch via the chat box at the bottom right of the page, and we’ll be happy to assist you.

Still Have Questions?

Support details to capture customers that might be on the fence.

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