Yes! Flair is an official Honeywell integration partner. Flair integrates with all Honeywell WiFi connected smart thermostat models and supports room sensors for T9 and T10.*
Honeywell room sensors (available for the T9 or T10) can be used as temperature sensors in a Flair System. At least one Puck is necessary to act as a Gateway to bridge Smart Vents to the internet. See How many Pucks do I need for my central system?
Have a converted garage, porch or extra room with a mini split, window AC or portable installed? Use Flair's Mirror Mode to have the room follow your ecobee set point, home/away and schedule.
*Flair supports WiFi-connected Honeywell Home (formerly Lyric) thermostats and Honeywell TCC thermostats. When integrating your Honeywell thermostat with Flair You'll need the login credentials for your Honeywell Home app or Honeywell TCC app.