I have a small log home. The logs are efficient insulators plus they act as a heat sink. My heat is baseboard hot water and I have two thermostats controlled by a homemade switcher. The "day" thermostat is set to 65=B0 and the night one is 57=B0. This does save some oil. My question is about daytime if I leave the house. Does it make sense to go on the lower setting for just four hours? It would use less oil during that time but then it would use more to "catch up" when I get home. What would be the minimum number of hours that would give the best savings on oil?
---MIKE---