If you set your Puck to 70ºF/21ºC, but it’s 69ºF/20.5ºC in your room, you might see that the heat doesn’t turn on. All thermostats, including Flair’s algorithms as well as smart and regular thermostats, maintain a range of about 2ºF/1ºC around your setpoint temperature. This is called a hysteresis band. It is also called a maintenance band. It prevents excessive wear and tear on your HVAC equipment.
Flair maintains this industry standard because if it turned on the heat or AC every time the room temperature changed slightly, your HVAC system could turn on and off several times in the span of a few minutes. This would be noisy, uncomfortable, and could affect the health of your HVAC system.
Flair has a band of 1.8ºF (1.0ºC) above and below your room setpoints. Flair will only switch your heating or cooling on when your room temperature is 1.8ºF away from your setpoint.
It may seem like Flair’s band is larger than 1.8ºF, but this is most likely due to the time it takes for Flair to talk to your smart thermostat’s API. For some smart thermostats, this may be up to a 20-minute delay due to restrictions placed within their design.
Here’s what may happen if you want a room heated to 70ºF using Flair.
- When the room temperature cools to about 68.8ºF, Flair will tell your smart thermostat to turn your heating on.
- This process may take up to twenty minutes, due to restrictions placed within the software of your smart thermostat.
- Your room will begin to heat. If you have Smart Vents, they may open or close depending on your home.
- Flair will tell your smart thermostat to continue running until the room temperature reaches about 70.8ºF. Then it will turn off the heat.
- When the temperature falls again (if it’s cold outside) to around 68.8ºF, the cycle will repeat again.