Was the boiler serviced properly?
When boilers are serviced you would expect the boiler efficiency to subsequently stay the same or improve? HeatingSave's algorithms are constantly watching over the consumption data and spotting when the boiler efficiency goes down. The maintenance company can be contacted to explain why this has happened? The important thing here is that you will have the data to hand to show them what is happening; that is cause & effect.
HeatingSave can also monitor degradation in performance over time, alerting the user to get the boiler checked or serviced.