Kenneth, back from the Great War?

As an emergency first responder for the gas company I don’t believe there is ever a time that the fire department doesn’t call us out when someone calls them for CO. On the contrary, I am called out many times directly with people not calling 911. 95% of the time the fire department isn’t needed for the situation. If I need them to vent out the building with their gigantic fans, then I’ll call. CO detectors generally start alarming at around 35PPM CO. If the homeowner calls us immediately all I need to do is open a few windows to get a draft going and in 20 minutes the house is below 5PPM. I’d rather not tie up emergency services when they might be needed elsewhere. Just my take.