This morning DS got up and made himself toast or rather set the toast on fire. The smoke alarm went off in the dining room but was so faint we couldn't hear it at all from upstairs. Even after he came in the bedroom to tell us it wasn't the sound but rather the smell of smoke that made us rush downstairs. It honestly sounded no louder than a fridge beeping that's been left open. The smoke alarms are not connected together and it's quite a big spread out 5 bed house. Surely this isn't a safe set-up?