The main feature we bought the T9 for was it's remote sensor capability. Having remote sensors solves the problem of the temperature differences between the first and second floors of a two story home that only has only one HVAC zone, especially at night on extremely hot summer days or very cold winter nights. Either case results in a very warm second floor. We put a remote sensor in the master bedroom and have the program schedule monitor the master bedroom at night in both summer and winter. The prgramming is also very easy to navigate and much easier to set up than our previous thermostat. Monitoring the temperature of the house from our phones was important to us because we are out of town a lot in the winter. We have it notifying us if the temperature in the house deops below 65 degrees. No more need to ask someone to go check on the house.
Its okay compared to EcoBee. I prefer the features and layout of Ecobee. Honeywell seems to lack some basic features. Mainly in setting the allowabe diffences from room-to-room that have sensors.
Temperature lag with the wireless remote sensor made for big temperature swings. This stat didn't have near the programming options as the Vision Pro 8000. The T9 can't even control a humidifier! It's also too small to cover where the old stat was on the wall. What were they thinking? At least they could have included a cover plate but it costs extra.
I decided to return the T9 and keep the Vision Pro 8000.
If your thinking of buying this model for the Geofencing feature, don’t bother. It works for a short period and then is stuck on away and no amount of rebooting or manipulation will change it. Otherwise it’s a good thermostat. The app isn’t great but minimally functional.
No, I would not recommend this to a friend.
Response from resideo.comBy Support, February 17, 2022
Hi, this is not something you should expect and we apologize for the experience. Please don't hesitate to reach out to us if you're still experiencing any issues. Our Support Center link at the top of the page has all the ways you can get in touch.- Charlie