Every room with Smart Vents needs a temperature sensor. An integrated smart thermostat or its room sensors can be used instead of a Flair Puck to read the temperature and also provide occupancy data.
If you decide to use a smart thermostat and/or room sensor in a room with Smart Vents, please know that every Flair system needs at least one Gateway Puck and it's recommended to determine how many Gateway Pucks you may need for your system.
A room sensor cannot be used to control a mini split, window AC, or portable.
Note: Nest does not allow access to its room sensor data by third-party products, so their sensors cannot be used with Flair.