Radiant Electric Ceiling Heat

Anyone have any experience with using a z-wave thermostat to control radiant electric heating panels in the ceiling?

My house was built in the early 1970s and each room has electric heat in the ceiling, and every room has an ugly old thermostat. I did some investigating and it looks like i can use a relay by Aube Technologies that will allow me to connect a z-wave thermostat to control the heat.

I’m just not sure if this will work with my system, or what relay i need to purchase. Attached are some images of the thermostat, wiring, and the circuit breaker. Thank you!