[Gremlin]

We have a smoke alarm in the hallway but in the kitchen there is a fire alarm.

It will not sound a warning if I burn toast or anything similar but only go of if there is heat from a fire, that is what the fire officer explained when he visited us after the house was built.
I wonder if they would be any good for you less.
I do think though that once the heat rises enough to set off the fire warning alarm the toast will be past saving and most of the kitchen will be on fire. The fire officer recommended it though. Both alarms are hard wired and battery supported.