An increased efficiency boiler system includes a boiler, a thermostat in operative communication with the boiler and a controller. The controller is in communication with the boiler and the thermostat and selectively exchanges data with the boiler and the thermostat. The controller determines a proportional time period, reflecting how long the thermostat is requesting heat from the boiler within a predetermined time period, in dependence upon the exchange of data. The controller further determining a cycle frequency reflecting the number of times the thermostat is requesting heat from the boiler within the predetermined time period. The controller adjusts an energy input provided to the boiler in dependence upon the proportional time period and the cycle frequency.