The time of year becomes a big factor for desired temperature settings. In the summer months, the average temperature setting is 78°-80° and in the winter 70°-72°. There is also personal preference based on the individual – some like it warmer, some like it cooler.
When the house is not occupied, try to avoid drastic temperature changes. Many do this thinking it will save them energy and costs, but it can have the opposite effect. Do not set your temperature back more than 5°; as this will cause your unit to work harder to achieve the desired temperature setting.