Because of regulations preventing the occurrence of Legionnaires' disease, the boiler has to be left on at a temperature of at least 60 degrees Celsius for an hour per day. HeatingSave "has certainly helped us make savings on that," said Zofia, who added what she likes about the system: "It gives us the flexibility of being able to alter the temperature settings according to our operational needs, which then allows us to save money. Also, it's the quality of service we can provide our residents. It's difficult because the residents have mental health problems, and they are out for most of the day, so we can't justify heating an empty room all day. I can then react to any complaints that it is too cold, and change the temperature. She added: "We use HeatingSave as a boost to the system, which means for the rest of the time I can leave the boiler much lower — so we are making some savings out of that."