They makes sense. Have you considered using another filter? A box fan with a hepa filter or one that has appropriate sized holes may even work better for pollen

They makes sense. Have you considered using another filter? A box fan with a hepa filter or one that has appropriate sized holes may even work better for pollen and also be washable by default. Did you want the smarts in it if any? I'm hooking a plantower sensor to a purifier or you can use the Ikea air quality detector to smart trigger it. https://esphome.io/components/sensor/pm1006.html https://esphome.io/components/sensor/pm1006.html