Filter-change indicator

A suction-blockage indicator light alerts you when airflow is restricted so you can clear clogs or clean the filters, making it easier to keep suction strong without guesswork.

A simple exhaust filter gauge advances over time after you press an activation button, turning fully red when the HEPA or charcoal filter is due, so owners do not have to guess when to replace it and can quickly check the strip whenever they open the hood, as demonstrated in this review.

Multiple reviews note that the LCD interface includes maintenance messaging, such as notifying the user when the filter needs attention (washing/replacement guidance varies by source and phrasing).

Filter-care reminders are provided via the on-device display and/or app, reducing guesswork about when to wash or replace filters for consistent performance.

App-based component tracking provides reminders for filter/brush replacement; users can often wash filters and monitor remaining lifespan via counters.

The app commonly includes usage-based maintenance timers/reminders for parts like filters and brushes. This helps schedule cleaning/replacement, though it appears more timer-based than sensor-based in most descriptions.