Re: Heating costs VS Temp. Control
Any amount of temperature set back (either done manually or through a programmable thermostat) will result in energy savings because the less the temperature difference between the indoors and the outdoors ..... the less the heat loss.
The longer the set back time, and the greater the set back temperature, the greater the resulting savings.
Energy savings resulting from set back is a curve ....... the savings from a 10 F set back is not double that of a 5 F set back but it is greater.
General rule of thumb ...... for an 8hr period ...... 1 F set back = 1% energy savings.
It's recommended a minimum set back of 6hrs for maximum savings .
The amount that you set back your furnace is best determined by your comfort level.
The greater the difference between the actual temperature and the desired temperature, the longer the furnace will run, but it will be less than if it maintained the higher temperature all night long.
However ..... water radiator heated houses are slower to catch up the set back and have to be started earlier in the morning ..... giving you less total savings.
Just a thought.
"" an ounce of perception -- a pound of obscure "