My power company suggests setting the thermostat back by 10 degrees at night or when away from the house to save energy in winter. I am wondering if this advice is for forced air heating rather than boiler/radiant heating situations? I have a 900 sq ft house with original cast iron radiators and a newish (6 year old) boiler. I have noticed that when I turn back the thermostat 10 degrees, it takes my boiler 3-4 hours to get the house temp from 56 to 66 F. Someone told me that when a house is heated by radiant heat, the stuff in the home - furniture, walls, etc. will hold the radiant heat and contribute the heat back to the room, or help maintain the temperature of the house at least for a while. So I was wondering for a house heated by radiant heat, does it save more energy if a person maintains a modest temperature- in my case, maybe 62 or 63 F at night or when away from home, and then increase to 66 F when people are active in the house? Or is there other advice or strategy for saving energy when the heat source is radiant heat vs forced air heat?
Many thanks for any thoughts on this question!