Oh, and another thing to consider when swapping tstats in a customer's home. You may now own every HVAC issue they have. We just swapped tstats in a home and we found out after the fact that there were some issues in how the entire system was designed - some rooms got hot really fast, others not fast enough, etc. (to be clear, these were airflow issues, not thermostat issues) As soon as we had an issue with one of our new tstats, it instantly became this vague "cloud" of HVAC problems, and it didn't matter whose fault it was....we were involved either way.

So a big +1 for handing it off to an HVAC contractor, then just setting up the integration once they are 100% complete on their end.