Molekule devices will clean and maintain clean air based the room size and the selected mode or fan speed. All Molekule air purifiers can complete at least 1 full air change in a room within an hour.
For Molekule Air, you can see the remaining time for the initial cleanup on the Molekule touchscreen display and the app. If you are moving Molekule Air from one room to another, quickly indicate what room size it's in, and you'll see how long it will take until the air will be considered clean.