Vallox 51 MV / 51K MV filters

Vallox systems use a three-filter setup to ensure optimal air quality and protect the system. Our replacement filter set includes two G4 filters and one F7 filter.

One G4 filter captures coarse particles from the extracted indoor air, protecting the system from dust and debris buildup. The second G4 acts as a pre-filter on the supply side, trapping larger particles such as insects and debris before they reach the main F7 filter. The F7 filter performs the greatest filtration function, capturing finer particles such as dust, pollen, and allergens, thereby improving indoor air quality.

This combination helps extend the system’s lifespan and maintain efficient performance.

Most Vallox filter sets are three-piece G4+G4+F7 sets: two coarse G4 filters that protect the heat exchanger, plus a fine F7 (ePM1) filter for the supply air. Some older ILMAVA models use different combinations, such as G1+G1+G4 or G4+M5+F7, so match your set by model or by the Vallox filter set number.

No. Each ValloPlus size takes its own filter set: ValloPlus 270 uses set No. 27, ValloPlus 350 No. 22/24, ValloPlus 510 No. 28 and ValloPlus 850 No. 29. Match by the model name on your unit's label.

Vallox's digital controllers assess filter contamination based on one or two indicators:

• The number of operating hours elapsed
• On some models, the pressure difference across the filter

This is a useful reminder, but it's also worth checking the filter visually and assessing airflow manually, especially in the first year after a new unit is installed, when the actual rate of contamination isn't yet known.

We stock filter sets for Vallox's residential range — ValloPlus 270, 350, 510 and 850, numbered Vallox models such as 096, 110, 145 and 245 MV, Digit, TSK Multi and older ILMAVA units — widely installed across Finland and the wider Nordic market. The model name is printed on the unit's label.

Vallox groups its filters into numbered sets — for example, set No. 27 fits the Vallox 096 and ValloPlus 270, and set No. 28 fits the Vallox 145 and ValloPlus 510. Our product titles include the set number next to the model names, so if you know your set number you can match it directly. If not, find the model name on the unit's label and search by that.

Yes. Vallox is one of the most widely installed MVHR brands in Estonian homes, so we keep filter sets for the most popular models – such as Vallox 90 SE, 101 MV, 110 MV and the ValloPlus series – in stock at all times. In-stock sets are dispatched within 1–2 business days and delivered throughout Estonia via Omniva, SmartPost and DPD, with free delivery on orders from €100. Vallox filters are sold as complete sets (usually two G4 filters and one F7 filter), so you only need to check the exact model name before ordering.