Yeah, right..... On the news, they were touting 10 years for replacement. I like the 5 years idea though. I need to put some up here, there are a couple NIB ready to go, but I think I migh tlook for some interconnecteds.... Gotz ta got da ebonicz detecto, bro.... Hmm... I think I might be starting to not dislike you now! On the CO (carbon monoxide) detectors. Doesn't CO build up from the ground up, making it important to have them neat the floor? Maybe I'm thinking something else, but I thought that's how it worked....