Honeywell Smart Thermostat, No Hub Required

It works as advertised. I enjoy the ability to control the temperature when I need to, on my phone, from the floor below the thermostat's location. My only gripe is the pale green screen on the thermostat itself is hard to read under almost any light condition.

The device functions properly, I purchased 9 units. However, my application requires WiFi and a thermostat that will read sub-freezing temperatures. After installing my cold environment thermostats, I discovered these thermostats will not read temperatures below 40 degrees. Research reveals many people are disappointed in this model of Honeywell thermostat for this reason. I would not recommend this thermostat for the small percentage of us who have a desire to read lower than 40 degree F temperatures. Otherwise the thermostat works fine; however, not for my temperature applications.

I have the thermostat up and working with WiFi access. However, I notice two factors of operation that dissatisfy me. 1) The control point versus set point hysteresis is too small. This causes the furnace in heat mode to cycle much more often than is practical. For example with the set point at 70F, it is not unusual for the furnace to turn on three to fourtimes in one hour. When I had my older smart thermostat on the system, the furnace would turn on once or at most twice per hour. 2) I have the "Smart Response Technology" function turned on. I have the heat turn up from 62F to 70F at 7:00AM. However, the preheat is occurring at 5:30 AM or earlier. On the first heat it takes about 15 minutes to reach the target 70F. A preheat recovery time of 1.5 hours is far in excess of the target time of 7:00 AM.

not liking this device right now because it is disconnected again and we are in Canada and unable to reconnect AGAIN. It took two hours to connect the first time and now we are not there to connect it again so we are on our own without control of our thermostat!!!!!!

I would recommend this thermostat, It's so nice to just use my cell phone to operate the thermostat. No need for a professional to install it because it was so easy to install. all you need to do is follow the direction it's only 6 low voltage wires.