Question about Dyson Purifier Filter

I ordered the filter on 25.07. and it was delivered the same week. It came in original Dyson packaging and from Dyson.

I bought the exact one for the Dyson PH04 and it seems to be original (packaging, inserts, etc). However, I haven't used it yet, but I reset the warning for the filter because I don't feel that it has had much to filter in the last six months or the device has never displayed critical values. I will only change the filter after one year.