Asphyxia, gas poisoning, fumes, fire and explosions are common hazards so employers and employees need to be aware of the Confined Spaces Regulations 1997.
Confined Spaces Can Kill
Carbon Dioxide Dangers in Confined Spaces
Carbon dioxide, a common by-product of breathing, is lethal to humans in larger doses. The standard level of CO2 that a human can live under comfortable is around <600ppm but in many cases higher levels of CO2 are exposed to humans and can cause problems ranging from headaches to death depending on the concentration of the gas.