This probably applies to most programmable thermostats. What advantage does one gain or lose by changing the temperature differential setting (the amount of degrees the thermostat has to sense before a call for heating or cooling? Mine is set to the default which is 0.5 degrees. However, it is adjustable up to 4 degrees. I realize that increasing this setting would have a direct effect on temperature swings and in effect, the comfort level. But why would one want to do this? Does increasing the time between calls (by increasing the differential number) create some sort of savings? I have a 2 stage Waterfurnace Envision with an ECM blower. Does that matter? I just don't get why prolonging the inevitable (calling for heat or cooling) has any advantage.