It’s been a year or more that people have been waiting for Google Home hardware to be able to control Insteon home automation hardware. Finally Insteon has come out with support for Google Assistant!
Insteon sent out an email earlier today with:
Here at the Home Automation blog we've been looking into options for how we can remotely control a thermostat in a home. We honestly haven't found a whole lot of information for solutions that we deem acceptable yet.