I don't understand exactly which filters need to be replaced. In the shop it has a formaldehyde filter. Question: the activated carbon filter also needs to be replaced, doesn't it or are they identical?

Question

Answer

It has 2 filters.
Filter 1 = Pre-filter
Filter 2 = Multi-slot combi filter

Filter change indicator 1 flashes: 
Filter 1 (the pre-filter) needs to be CLEANED. For further instructions, see chapter "Cleaning".

Filter change indicator 2 flashes: 
The combi filter (multi-slot) must be EXCHANGED.
Combi filter AC4147 available at Galaxus at:
[Philips AC4147/10 Formaldehyde Filter](https://www.galaxus.ch/de/s2/product/philips-ac414710-formaldehydfilter-luftreiniger-zubehoer-3454123)


My tip:
Manual (read instructions for use if available)

Answer

I think that the formaldehyde filter and activated carbon filter are the same. In any case, only one filter fits in the unit. The article designation is AC4147-10.

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I don't understand exactly which filters need to be replaced. In the shop it has a formaldehyde filter. Question: the activated carbon filter also needs to be replaced, doesn't it or are they identical?