Brofer RDCD filters

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.

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.

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.

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.

Twice a year, and the timing matters more here than in most countries because two separate dust seasons fall close together. The best moment for the spring change is between the street dust season and the birch pollen season, typically in April or May: the filter has already taken the winter grit and is about to face the pollen. The autumn change is best made after the pollen season has ended and before the heating season really begins, so the unit goes into its hardest-working months with a clean filter. Homes near a busy road, with pets, or with allergy sufferers usually need more than two.

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.