These smoke detectors were in my apartment (new building, only 2 years old) from my landlord installed (hall, bedroom and children's room). I wanted to expand this to 2 other detectors. In the bedroom .... Unfortunately in summer 2014 ..... he also went off at once. For No Reason. Even this was like many others report here defect. Was immediately replaced by an electrician. Silk was the No false alarm. According to it is definitely. And the response is very low, ie, my detector in the hallway leaped at Christmas on because I had blown out immediately including 5 candles at once. Since I was not angry that he went off. Because that showed me that he is very responsive. The cheap from a hardware store for 2/3 Euro react very late. The installation is very easy, try it so I do 2 times a year.
