Brofer RDCD filters

Start with the model code on the unit's label — we stock filter sets for the Brofer RDCD25(SK), RDCD35SH, RDCD40SK/RDCD50SK, RDCD50SH and LQR280. If the label isn't legible, measure the extract and supply filters directly (length × width × depth in mm) and match them against the sizes on our product pages.

Brofer units use G4 filters to protect the heat exchanger. For the RDCD models we stock two versions: a G4+G4 set, or a three-filter G4+G4+F7 set that adds a fine F7 (ePM1) supply filter for pollen and fine dust. The LQR280 is available as a G4+G4 set.

We recommend the standard 3–6 month interval for Brofer units, checked more frequently in the first year after installation to establish how quickly your specific environment loads the filters. Homes with pets or nearby renovation work should lean toward the 3-month end of that range.

Using a correctly sized, ISO 16890-compliant compatible filter does not affect your Brofer unit's mechanical or heat-exchanger warranty, since filters are a routine consumable part rather than a structural component. Manufacturer warranties typically only require that filters meet the correct class and dimensions, not that they carry the original brand name.

Often yes, at least for the supply side. Germany's pollen calendar runs from hazel and alder in late winter through birch in spring to grasses in early summer, and the German Weather Service publishes a daily pollen forecast index for the regions. During the peak weeks the filters load noticeably faster than in autumn — especially the fine F7 (ePM1) filter in the three-piece G4+G4+F7 set, which is designed for exactly this job. If you currently run a G4+G4 set, the RDCD models can also take the three-piece set with the F7 filter. If someone in the household has hay fever, check the Brofer filters monthly through spring and early summer rather than waiting for the calendar, and consider timing one of the year's changes for just after the grass season ends.

Keep unopened Brofer filters ready for installation by following a few simple storage rules:

• Leave them in their original packaging until you're ready to install
• Store in a dry, room-temperature space
• Keep away from direct sunlight and moisture

Filter media can absorb ambient humidity if left unwrapped for long periods, which slightly reduces its dust-holding capacity before it's even installed.