Like the title says, moved into a new house, we have seven exterior doors, and six thermostats. It's a gigantic historic home, so we have 3 AC air handling units with each having its own thermostat, and a hydronic heat system, with one boiler, and three zone valves. The house sits on the street, so parking is behind, and we're never aware when someone's at the door unless they walk around the whole house to knock on the front door. We have a security system that's Z wave based with alarm.com service, so panel and all that is already there.

For door locks, my biggest concern was how to get them all rekeyed to the same key. Is there such a thing as a contractor pack of locks I could get? Not too particularly set on specific aesthetics here, but some doors only have a changable deadbolt, cause the doors are the original 200 year old things, and don't want to mess with them too much.

For doorbells, there's lots of options, is there a specific place to look for reviews, or a particular brand to avoid? Would love a doorbell camera, but I know z wave isn't strong enough to support video, and I'm not sure how to figure out which z wave compatible doorbell cameras would work with my alarm.com stuff. I thought about getting the alarm.com skybell slim or one of the eufy products if I just wanted the camera but not integrated into the security system.

As far as the thermostats go, it seems like the GoControl Z-Wave Battery-Powered Smart Thermostat would be ideal, but where my AC units are fine, my heating is single stage, will it still work? Is there another option I'm not considering here? I don't have c wires, so anything wifi based is out. Our boiler guy said he recommends just setting the heat and leaving it alone, so maybe the answer is to turn the boiler switch (it's just a light switch in appearance) into a z wave switch so I don't have to march back to the boiler room to turn it on and off during the shoulder months?