How energy efficient is your household? If you are not sure what we are referring to by "energy efficiency" we are talking about whether you waste a lot of energy in your home. Do you leave appliances turned on when you are not using them? Are your windows aged and in poor condition? Or maybe your heating system is used more than it really should be? These are all ways in which you can waste energy, which not only drives up the amount you spend on energy each year, but also contributes to pollution and global warming. There's a lot of talk about how you can improve the way in which you use energy, and the truth is that there are many things you can do to achieve this goal, but the installation of programmable thermostats is quite possibly one of the simplest and most cost effective ways to do so.