Steam boilers can be dangerous if the temperature is not properly regulated and the system becomes overheated. Safety controls are essential in the prevention of overheating and continued efficient operation of the boiler.
A steam boiler should maintain a temperature no greater than 212 degrees Fahrenheit in order to prevent a potential fire. To regulate the temperature, a steam boiler must have a limit switch. For optimal safety, the boiler also needs to maintain a water level at least at the halfway point in the sight glass and have an automatic water feeder.
Another possible danger from steam boilers is the need to maintain a large volume of low pressure steam; a working pressure relief valve allows for needed periodic steam pressure release.