Programmable thermostats allow homeowners to pre-program multiple temperature settings for different times of day and different days of the week depending on their typical schedules. Multiple settings allow homeowners to be comfortable when they are home but use less energy when they are not. Programmable thermostats also allow for manual adjustment to increase comfort as needed. According to Energy Savers, homeowners can save 5-15% of heating and cooling costs just by changing the temperature 10-15 degrees for 8 hours per day. Moreover, your furnace and air conditioner will not "work harder" to return the house to a comfortable temperature when you return, as your home loses energy more slowly when its temperature is closer to the temperature outside. Your home will remain that way until the heating or cooling requirements go back up.
Note: If you have heat pumps, electric resistance heating, steam pumps or radiant floor heating, programmable thermostats were previously not recommended. However, some manufacturers of heat pumps, steam pumps and radiant floor heating are now providing programmable thermostats specifically for those products. In addition, regular programmable thermostats may be programmed appropriately for steam pumps and radiant floor heating to accommodate for their slower response time. Please visit Energy Savers for additional information.
Estimate your potential to save energy and money by installing this product, please see the U.S. Department of Energy’s Home Energy Saver calculator.