Please note: Effective August 31, 2019 Google has discontinued WorksWithNest integration support. Accounts that are logged in will continue to function normally, but no new sign-ins are possible. You may read more about it here.
You can designate how long your Nest fan will run. After you have set up your Awair + Nest integration, go on the Nest app, select your room, select the ‘Fan’ button on the bottom, and select the number of minutes you want the fan to be on for.
The Nest fan will run until the CO2, VOCs, or Dust levels reach the desired levels that you initially set during your Awair + Nest integration set up. See below for screenshots: