But a propane appliance starved of oxygen can quickly produce dangerous amounts of carbon monoxide. For safety s sake, use your propane appliance only for the purpose for which it was designed. Never use an unvented heater, even for temporary heating, in a residence, in any enclosed space, or any place where sleeping accommodation is provided. Carbon monoxide poisoning could result. Never store propane cylinder indoors.
Carbon monoxide is colourless, odourless and extremely toxic.
Unconsciousness and death can result from prolonged exposure to the carbon monoxide produced by a malfunction or misuse of a combustion device. Poor ventilation will increase the risk. Carbon monoxide detectors are available that sound an alarm when dangerous levels of carbon monoxide are present. If any of the following symptoms should develop, get into the fresh air immediately. For recreational use, propane is generally sold and stored in a cylinder.