Yes! Flair is an official Honeywell integration partner. Flair integrates with all Honeywell WiFi-connected smart thermostat models* and supports Honeywell Home Smart Room Sensors compatible with the Honeywell Home T9 and T10 thermostats.
Honeywell Home Smart Room Sensors compatible with the T9 or T10 thermostat can be used as the temperature-sensing device in a Flair room to automate Smart Vent operation.
*Flair supports WiFi-connected Honeywell Home (formerly Lyric) thermostats and Honeywell TCC thermostats.