1.My Nest thermostat is programmed w/several temperature ranges during the day - I have temperature range settings for early AM, mid-morning to afternoon, afternoon to evening, and then bedtime. Does this system support that level of control?
Yes, you can use the smartapp to control your setpoints during the day. You can define up to 12 schedules in the smartapp: some for weekdays, others for weekends, etc…
2.Do the current vents on the Keen site include the pressure sensor? Can’t find a model number on them on the site.
There is pressure sensor that comes with the vent. However, the pressure sensor reports some absolute barometric pressure values which (alone) cannot be used in HA scenarios.
3.If we only replace a subset of vents (in the too cold and too warm rooms) does that really work well? Seems like the remaining dumb vents would siphon off hot/cold air and make it harder for the system to balance temperatures properly.
Well, it really depends on your HVAC’s performance as well. If your HVAC airflow is really unbalanced, adding smart vents will not correct everything. When there is a huge temperature variation between rooms on the same floor, it’s also recommended to balance your “airflow” by an HVAC technician.
Smart vents and my smartapp can help to a certain extent, but they will not correct a severely “unbalanced” HVAC system.
4.How important to have motion and temp sensors, vs. just temp sensors?
It’s important if you want to use some advanced features of the smartapp: to set your Nest thermostat to away & present or control your smart vents in order to open only the vents in occupied rooms (all these scenarios are based on motion detection).
Refer to the beginning of the thread for more details on each smartapp solution that I created and the ST community wiki.
If you’re planning to buy some Keen Home smart vents, there is a referral link down below that you can use to get each smart vent for $25 less (you need to enter the promo code several times if you are buying several vents; just buy them one at a time).
P.S. The ScheduleTstatZones thread was created more than a year ago. This thread has been created this year with the latest features described at the beginning of the thread.
EDIT: Some Motion sensors like the SmartSensor and the Iris 2nd gen sensors already come with Motion and Temp capabilities and they don’t cost much more…