My house is pretty new, 5 years old. It has interconnected smoke alarms in every room (11), as required. I believe they are all First Alert brand.

We have been getting false alarms from them about every 3 months. Most of them are in the middle of the night which isn't fun for me, and really terrifies my kids (6 & 8).

There is no apparent cause, no cooking is going on, no dust. They go off for a while and stop on their own. Some of these are CO detectors, but we had the Fire Department come out when it happened one time and they tested and everything was fine.

When they are going off, I can't find the one that is causing it because they are all going off. However, on these the "ready" light blinks red if it has been triggered in the past, and every one of the units has triggered based on that. I actually permanently removed one because it triggered 3 times in one night. I thought it was a bad unit, but it just happened again at 5 this morning with a different one.

Nobody has died in this house, so I'm pretty confident it's not ghosts (/s)

Anyone have suggestions?