I have a shop in my "lower level", at the other end of the house. If a fire developed in the shop after we went to bed the chances of me hearing the smoke alarm (the one in the shop) is about zip. It would seem someone would make smoke alarms that triggered the other smoke alarms in the house. It sounds good, but the only options I could find were complete alarm systems, something I don't need/want, and that costs lots of money.
Does anyone know of a solution?