Google Nest Community

Here is the picture of the board inside the Lennox unit 

I plan to take the cover off the unit this week to see if the board is located there, Will keep this post informed

I would have to take off the panel on the blower unit as it looks like that is where all the wired terminate. I would think the terminal board is enclosed there???

Here is a picture from the unit 

It is a Lennox heating and ac system with a variable speed blower. I don’t know if it is a communicating system, but doubt it with the standard iComfort WiFi thermostat from what I have been able to tell…