Switching Lennox iComfort Communicating TStat to Nest

[bigverm23]

Hi all, are there any reference materials for switching from a Lennox communicating tstat (with an EIM in between HVAC and tstat)?

[zoeuvre]

Hi bigverm23, 

Thanks for posting here in the Community forum and for showing interest in our Nest Thermostats. I see that your current thermostat has the non-standard labels of i+ and i- which means that your system is proprietary. 

Proprietary systems aren’t compatible with Google Nest Thermostats. However, some proprietary systems can be rewired by a pro installer to be compatible.

Let us know if you have any other questions.

Best,

Zoe