Say I want my home at 74 degrees when I'm home (or when family is home).
Does it make sense to use a programmable thermostat and keep the home @ 74 except for a relatively small number of hours? I'm worried the cost of "cooling down" the home will eat up the savings.
For example, perhaps no one is home between 7:30 AM and 3 PM. Would moving the temp up to 80 during that time save me money? Or, would the additional cost of cooling it down from 80 to 74 around 3 PM eat up the difference?