A. If you use a 5 degree setback you can save between 5-10% on your annual cost to run the furnace.  The cost to install a programmable varies greatly depending on what you purchase. It may take between 5-10 years or more to get a full payback. 

A. The cooler you set it in heating and the warmer in cooling the less energy you will use. Each person has their own temperature comfort range and we tell customers to find their optimum comfortable temperature and leave the thermostat set there for the occupied periods of the day.