Programmable thermostats

Programmable thermostats save you money by reducing your heat when you don't need it. Whether you want a different setting for weekdays and weekends, or want to schedule settings for each day of the week, there's a model to fit every lifestyle. Set your thermostat at 68°F and then program your thermostat to decrease the temperature 8°F when you're away from home and overnight. The only difference you'll notice is in lower heating bills.

Skill level: Advanced
Not difficult for those who routinely take on home improvement tasks, but many people like to have an HVAC specialist install theirs.
Cost range: $25-$250
There's an affordable model to fit any household, some including features like remote programming and indicators that let you know when it's time to change furnace and air conditioning filters.
Savings: Up to $180 a year (includes cooling)
By maintaining the proper settings, a programmable thermostat can save you approximately 8% a year in energy costs.