Yes the high performance HEPA Filter is included, the models Air Purifier 4 have eben a much more enhanced active cole filtering system and the filters last more than one year with this new generation of Xiaomi Air Purifiers 4 models.
The air purifier does not cool, but only purifies the air. It filters particles such as dust, pollen, animal hair, smoke and odours and thus ensures clean room air, but does not have a cooling function.
It is possible to reduce or switch off the brightness of the display, but there is no specific option to switch the display off completely. You can adjust the brightness of the display via the display on/off button on the back of the device to bring it to a dark setting. In sleep mode, the OLED display is switched off to create a quiet environment.
You don't actually need to clean the grille, as the air blows out upwards and no dust collects there. If necessary, you can remove the grille (fixed with a Phillips screw) and clean underneath. However, I wouldn't do this too often as I don't know how sensitive the ball bearings of the fans are.
Greetings
Hi, we use the air purifier 7/24 in auto mode and the filter lasts a good year. Regarding your question, I found this:
QUOTE
The calculation of the filter life is based on the time the air purifier has been used and the number of particles and air pollution. This usually results in a service life of approx. 12-24 months with a usage time of 12 hours per day
UNQUOTE
The Xiaomi Mi Air Purifier 4 (48 m², 30 W) does not emit ozone. Instead, it uses three-layer filtration and Negative Air Ionisation to purify the air and keep it fresh without producing ozone.
As far as I know, Xiaomi does not offer any spare parts, except for the filter. The fan is available from aliexpress or eBay for around 50. The sensor can be cleaned according to the instructions if it is dirty.
The violet filter has an additional antibacterial effect (apparently) and is only suitable for the 2 and 3 series - hence the Air Purifier 3H, whereby the Air Purifier 4 shown here offers the better filtration especially for allergy sufferers (99.7% with the 3H, 99.97 % with the 4) - in short - I would stay with this model.