@sugo, the fire and gas alarm is alternating between to frequencies and continuous.
Oh, I didn't saw it since you need to be logged in for that, I hope fire alarm works even if not logged in, and in that case I don't understand why I cannot set it locally like other alarms. Also I don't see how to test it.
Anyway: CO > 230 mg/m3 and T > 70 °C is probably too late. I understand you want to avoid false positive, still this should be customizable, like others alerts