When I first bought my house, I remember asking my mom for advice on what I should look for. She gave me so many different stories. The one I strictly remember however, is the one about the time she had a gas furnace. It was quite some time ago. She did not realize how much of a danger gas furnaces could be back then. She had been having some issues with it and decided she would call in the morning to the HVAC business one day. By that time however, it was too late. That night while she was sleeping, she heard the carbon monoxide detector go off. She panicked and ran outside. She made sure to grab everybody before she did go outside. I had no idea that if a gas furnace malfunctions, it could leak carbon monoxide gas. This is gas that could potentially kill you if you are not careful. This is why she had a carbon monoxide detector in the first place. Not only was she having trouble heating her house now, but she could not even go inside of her house in the middle of the night. She immediately called the police to help her. She could not go back in until it was cleared out and save to breathe in it again. Now, her whole house was cold with all of the windows and doors opened. It was the middle of winter and it was snowing. She said she would never get a gas furnace again. If she knew what she knows now, she would have never bought the house or replaced the system.