The thermostat is used to control a dual fuel heat pump (where the thermostat decides whether a call for heat should be satisfied with the heat pump or with the gas furnace). This decision relies on a balance point temperature configured by the installer and the outdoor air temperature (either from the Internet and configured zip code or from an outdoor air sensor). Unfortunately, unlike nearly all other smart thermostats, the T6 does not display the outdoor air temperature. Hopefully Resideo engineers will decide to improve the T6 by displaying the outdoor air temperature. Speaking of improvements/suggestions, Resideo engineers may want to consider supporting a configuration option for the dual fuel furnace being either standard efficiency or high efficiency so that the thermostat's logic can more intelligently select the optimal heat source (and with Internet connectivity, the logic could factor in electricity costs and dual fuel costs, as well as respond to utility company peak demands). Competing products are better than this thermostat.
This the BEST thermostat we have ever had. Been in this house 50 years and never really liked any that we had, but this is a game changer!! Easy to see, easy to use. Interfaces with our smartphones and even with Alexa. Worth every penny!!!
The unit wouldn’t follow the app until I used the Apple Home app. I’ve never heard of that app, I Shouldn’t have needed to use it to make my thermostat talk to your app.
The Apple App installation instructions are wrong.
on December 20, 2021
Posted by: Peddlerp
from Nashville
Frequency of use:Daily
Gender:Male
Verified Purchase:Yes
Our contractor installed this T6 in our new home. The unit itself is simple to use, the UI is basic and easy to learn.
The Apple App on the other hand was a pain... it would not connect to the T6. I tried to contact Resideo Tech Support but the telephone wait was over an hour. So I delayed the install until I had the time to waste on the telephone. In the mean time I loaded the Apple App on an iPad, it reacted differently but still would not connect to the T6.
After another one-hour plus wait on the telephone I finally reached a service rep, she had a French accent, charming but sometimes difficult to understand. We walked through the installation several times, still no joy in connecting to the T6.
I then allowed the rep to connect to my iPhone camera allowing her to watch both the T6 and my iPad during the installation, two more times trying to connect, we realized there was a step missing in the instructions to repeat a button press on the T6...
Finally connected, the App is a disappointment versus the Nest App that I previously used, but it did allow me to set a schedule and to instantaneously change the setting of the T6. Hopefully future versions of the App will be more robust.