A Little Backwards

We have a confused smoke detector. In the mornings, since we usually don't remember to turn on the heat before we go to bed, the house is pretty cool. When the house is cold the smoke detector in the boys hallway starts beeping (like a low-battery beep, not a there's-a-fire beep). When it warms up, the beeping stops. Kinda sucks since it has a tendency to wake the boys up! Guess we know Daddy's next project.