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33-00478–04 32
Other questions
Q: How can I uninstall my T9 Smart thermostat?
A: If you want to replace your T9 Smart thermostat, or if you’re moving out of your home and leaving the thermostat behind,
you’ll first want to clear out the personal settings that are stored on the thermostat. (Even when disconnected from power, the
thermostat will keep your settings and home router information in memory.) We recommend resetting the thermostat’s WiFi and
HomeKit® settings (if previously connected).
Q: Is there a motion sensor in the thermostat?
A: There is not a motion sensor in the thermostat. In most homes, the thermostat is mounted in a hallway, so when using active
rooms for priority sensing, we would want to exclude the thermostat.
Q: What happens if “Active rooms” is used and no motion is detected in any of the rooms with sensors?
A: If the thermostat is set to control by active rooms, and no motion is detected, the sensor in the thermostat is used and the
remote sensors are excluded. Most people schedule the sleep period to use “Selected sensors” rather than “active sensors” and
choose the bedrooms for the sleep schedule.
Q: When using active rooms, how long are those rooms considered after motion has last been detected?
A: The sensor has a dynamic occupancy algorithm based on how many motion events it sees within a certain timeframe. If
someone walks through a room, then the room will be occupied for 10 minutes. If someone is in a room longer, then the timeout
will be increased automatically.
Q: How do the wireless indoor sensors detects motion.
A: The sensors use a Passive Infrared Sensor (PIR) detector.
Q: How does motion-based priority work with multiple people in the house?
A: If the thermostat priority setting is set to ‘Active Rooms’, then any room that detects motion will become prioritized, and those
Rooms’ temperatures will be averaged together to be used as the effective indoor temperature. If people leave the room, then the
sensor will need to wait for the timeout.
Q: What’s the range of detection on the motion sensor?
A: There are many factors that can affect this (height, body size, layers of clothing, temperature of clothing, angle, etc.). The
typical range of our sensor is up to 20 feet.
Q: How does motion-based priority work with multiple people in the house?
A: If the thermostat’s priority is set to ‘Active Rooms’, then any room that detects motion will become prioritized. The average of
those rooms’ temperatures will be monitored so that the thermostat can adjust to your preferred temperature setpoint. If one of
the sensors no longer detects people in that room, that sensor will adjust after a period of time, using the algorithm based on
motion events that it sees within a certain timeframe.
Q: When using active rooms, how long are those rooms considered “Active” after motion has last been detected?
A: The sensor has an occupancy algorithm based on how many motion events it sees within a certain timeframe. This was set up
so that if someone briefly walks through a room, the sensor will tell the thermostat that the room is “occupied” for 10 minutes. If
someone is in a room longer, then the timeout will be increased automatically.
Sensors communicate directly with the thermostat via Honeywell Home RedLINK technology. After sensing motion, the
communication should take less than 3 seconds to assign the room priority, depending on battery and signal strength.
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