My friend and I had a heated argument (no pun intended) the other day in reference to heating one's home and cost savings. He cannot see why lowering you heat (not just at night) from 68 to 64 saves any costs. His arguement is that once you bring your house to the intial heat level (68 or 64) that the furnace will kick on when the house temp drop one or two degrees, therefor, whether the thermostat is set at either temp the furnace is only heating the house one or two degrees.
I argueed why not set it at 80 degrees then. His agruement should hold no matter what the house temp is set at. I gave this example. The outside temp is 30 degrees and your trying to maintain a inside temp of 68 degrees, you are trying to keep the house 38 degrees above the outside temp. Keeping the termostat set at 64 the furnace will kick on for the same amount of time to heat the house one or two degrees, but it wont happen as often and through out the heasting season this adds up to SAVINGS.
He disagrees. Please help me settle the arguement. This guy wants scientific proof. I could not find any on the web. If there is a web site I can use please let me know. I will use any reply to prove my side.