Magnets can be secured by simply pushing them in and do not require any adhesive.
8mm magnets secure in place stronger.
If the airflow is weak at the back exhaust when printing, adjust the fan power +10%.
I printed the model with black PLA+.
What you will need
Google “hepa filters for Ilife V3, V3S, V3S Pro, V5, V5S, V5S Pro”
The author remixed this model.
Remixed the model for 8mm magnets.