An observation on the Vivint thermostat...
Edit: made a simple solution for the exhaust heat, now the wall is the same temperature all the way around the thermostat and it matches my Govee thermometer a few feet away. Probably leave it for now, no matter how good the patch job it's still going to probably be obvious something used to be on the wall there. I think the deflector will look better than the patched holes. If I ever upgrade it to the v2 hub I'll definitely have them move it. I can't help to wonder how much money the previous owners wasted over the years with the AC running for no reason. Pics of the deflector https://imgur.com/a/OBTrR1v
Tldr: Don't let your installer put the hub directly below the thermostat.
I recently moved into a house with Vivint already installed and figured out pretty quickly that the hub vents hot air directly into my thermostat and also heats the wall behind the thermostat. This has been causing significant temperature issues and running the AC way more often than necessary. Throughout the day the temperature difference between reality and what the thermostat said could be anywhere between 0 and 6 degrees off. Last night I put the cardboard deflector on and thermostat temperature went from 75 to 69 once the wall cooled off.
At least this gives me a new 3d printer project to make a nicer looking deflector today.