The Shabbat issue these thermostats have is sensing movement if that is something that can be turned off without really affecting the use of the thermostat or as I understand from other reviews - the display then that sounds like it has no Shabbat issues.
If @JM is able to use his sensor while turning off the motion detector aspect of it then @Dan needs a serious update to his article because apparently the T9 has been out for at least 2.5 yrs & takes care of the one issue he had with the other Honeywell.
I’d love to hear your opinion on these thermostats as it sounds like you have what to share…
Ok, so I checked: Honeywell T9 has 2 ways of setting room temps with various sensors. 1)
Selected Rooms 2)
Active Rooms. When using selected rooms, you choose the sensors that you want the T-stat to base Heating/Cooling commands off of. You can choose just 1 sensor and it will just base temperature settings off of that or you can choose 2 sensors +and the T-stat will take an average temperature of those sensors (an average temp of the home) and heat/cool to that avg temp. With the
Active Rooms setting, the rooms with detected motion are automatically selected to create an avg temperature in the home. When using
selected rooms, there is no issue of sensors utilizing motion detection. I personally don't use geofencing as well. This is all accessible on the controller itself and in the app so if you were someone who wanted the active rooms and geofencing during the week, it's 2 seconds to change it for Shabbos.
