Hello, I think that, as in my case, it's an ordering error, the filter wasn't the right one, there are 2 different sizes, so a new filter hasn't been used.
Thank you very much for your message. We are very sorry that your error report has not yet been processed. We have also forwarded this information to the responsible department so that this can be checked.
Unfortunately, we do not know when and if we will be able to arrange this item as new again. Alternatively, we still have a tested return for sale:
Xiaomi Mi Smart Air Purifier (1 x)
(At the time of this message)
Unfortunately, we can no longer obtain this item, so it is not known when or if we will receive it again. Yes, there are universal filters that can be purchased, but unfortunately we do not currently have these in our range.
I don't have precise information on the specific standard (H11, H12 or H13) for the filter in this air purifier. Xiaomi filters use a combined electrostatic and mechanical filtration technology, but the specific standards are not mentioned in the available data. It would be useful to consult the manufacturer's official website or product documentation for these details.
The filter is compatible with the Xiaomi Smart Air Purifier 4. It has been specially developed for this model and offers three-layer filtration consisting of a primary filter, a high-performance filter and an activated carbon filter.