The poisonous gas that kills nearly 300 people in their homes each year has no smell. What's more, it has no taste and no color.
Carbon monoxide is produced by burning any fuel.
Therefore, any fuel-burning appliance in your home is a potential CO source. Improperly operating appliances can produce fatal CO concentrations in your home. Likewise, using charcoal indoors or running a car in a garage can cause CO poisoning. Make sure appliances are installed according to manufacturer's instructions and local building codes. Most appliances should be installed by professionals.