Thanks, so it’s just new buildings that have to be smart then. They do need to be optical though (photoelectric) as apposed to ionisation, if I understand it correctly. Obviously being a Homey user I want to add smart detectors, so any recommendations?
I recently bought 3 smart smoke detectors and a smoke/co-detector. https://www.smarthomebeveiliging.nl/product/slimme-rookmelder/ is the one I choose. It isnt directly compatible with Homey, but I managed to get it to work by webhooks. So now, when it detects smoke or co, the lights will turn on in my house.
Works fine so far, and did cost a lot less than the Fibaro ones.