Trouble with one vent
Answered
I'm set to cool mode. In one room the temperature(set point) is set to 72 , the puck shows the room temperature to be 73.5 but the vent doesn't open to cool the room. If I change the set point to 71 then the vent opens. Should the vent not open sooner??
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Official comment
Hi David,
Our article on maintenance bands should help clear this up (it also applies to when Smart Vents open or close). For your convenience, I've pasted a little of it below. Basically, we follow hysteresis norms as established across the HVAC industry in order to prevent excessive wear and tear on equipment:
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.
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