On Jan. 7, 2015, Frasier’s Plumbing, Heating & Cooling in Rhinelander, Wisconsin, received an urgent call that caught their attention immediately.“Hello this is James … we’re having problems with our heater. Uh, it’s making really ‘moaning’ sounds ... um … the house is really dropping in temperature, and both my wife and myself have extreme, bad headaches. We’re thinking we may have a carbon monoxide leak. Thank you for calling me back as soon as possible. If there is no response, just … send help. Thank you.”Carbon monoxide (CO) leaks usually occur between November and March, but Jared Frasier, director















