We recommend that if you use natural gas, propane or solid fuel (wood or coal) appliances in your home, you install a carbon monoxide detector. Carbon Monoxide is an invisible, colorless, tasteless gas that kills and injures thousands each year. The symptoms can vary from person to person and depend on how much you were exposed to. Mild exposures can cause slight headaches, nausea, vomiting, fatigue, or flu-like symptoms. More severe exposures can cause severe throbbing headaches, drowsiness, confusion, and fast heart rate. Extreme exposures can cause unconsciousness, convulsions and death. The symptoms can vary from person to person and depend on how much you were exposed to. Mild exposures can cause slight headaches, nausea, vomiting, fatigue, or flu-like symptoms. More severe exposures can cause severe throbbing headaches, drowsiness, confusion, and fast heart rate. Extreme exposures can cause unconsciousness, convulsions and death.