We offer a variety of gas/diesel fired boilers for our heating systems. The burner of our boiler has an electronic connection to a safety thermostat. If the temperature of the flue gases coming out of the boiler's chimney exceeds the set limit, it means the water temperature has gone above 100 degree Celsius. The moment that happens the gas supply to the burner is immediately cut off and the system shuts down automatically. The boiler, however, remains undamaged and fit for use.