In the winter, I keep the thermostat at frigid temperatures when I am home alone and jack it up to warm just before any one else gets home. My thinking is that it is wasteful to warm up the entire house when it's just me since I can put on a sweater but I don't want to subject others to my, shall we say, quirks.
replyI keep meaning to calculate how much I am actually saving by freezing my butt off. My guess is it'll work out to something like $0.75 a day or something equally trivial.
Depending on the kind of heating system you have and the temperature differences you talk about it can be cheaper to heat the house to a constant temperature (because your heating can run more efficiently under lower load).
replyCorrect, or the people doing this for environmental reasons... it's probably not better to do this. It would be better spending money on better insulation (assuming it isn't up to date).
replyIt probably costs more to do that than to maintain a constant temperature. When you turn the setpoint down, everything inside your house and also your house itself starts losing heat. When you turn the setpoint back up, the cooled off house and items inside of it will suck up most of the heat until the stuff is warm again, and then the air warms up.
replyThis is much more noticeable when you go into a freezing cold building and turn on the thermostat, it takes almost an entire day to heat up the stuff and building.