How often should I change my filters?
How often should I have my system serviced?
If filter changes are kept regular, an annual service call is all you should ever need. Try and schedule your visit during a time of year where both furnace and AC can be checked at the same time.
Will programming my thermostat really save money?
Yes. There are a great deal of variables but the in the industry, 10 to 15% is common.