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Cheers, that's interesting. Given that smoke alarms are generally in the middle of the room and boilers at the edge that does seem to make combined ones a bit useless.
aggi-
I never understood the appeal of Nest Protect. I mean I get it, smart home and all, but they're inferior to a proper panel hard wired system and you're better off saving your money and asking your local Fire and Rescue Service for a free home fire safety visit, where they'll also fit free smoke alarms and advise best places for CO alarms too.
I have two of these FireAngel 7 year CO alarms, one near the boiler and one near the gas fire
paired that with 10 year heat alarm in the kitchen (middle of ceiling) and lined the escape route from the bedroom with 10 year smoke alarms; in my case that is the living room, and communal landing on each level.
ObiWomKenobi
Yes.
I have a Nest Protect, but apparently a carbon monoxide alarm must be within 1m of the boiler to get an accurate reading. Mine is located 5m away and has not triggered. I've moved it close to test and it triggered.
Lesson here: If your alarm isn't close to the boiler it is worthless.