Discussions

I have a question regarding carbon monoxide. I have a detector in my house that has been giving me some readings lately. It's never went off before, but in the past three weeks, it has beeped quite a few times. Is there anything in the summertime inside that could create carbon monoxide? I don't run our vehicles in the garage, our fireplace is shut off, our furnace isn't running, our water tank is electric. What else can cause it? When it's reading, it's usually around 52 ppm. Any ideas? Maybe my detector is warn out?