I’m having to replace a co2 and fire alarm and was looking to smarten all of them. My codes require a hardwire interconnect. I can’t find any detectors that have zwave and hardwire. I am finding posts here on how to add switches and relays, etc… was hoping for a plug and play solution.
There aren’t any made for the US at this time.
However, you can get any UL listed smoke detector system that you like for residential use and then add the eco-link fire fighter, which is a zwave audio sensor which can recognize the standard smoke detector alarm. So that gives you integration with your smartthings system.