One of the...cooler?...angles in the drive to reduce our energy consumption and therefore monthly expenses is to have an energy audit done of one's home.  What makes it cool is what's used to measure heat.  The potential use of thermography, or thermal imaging, during a home inspection or energy audit can tell you where all the hot spots...or cool spots are and result in ideas for money saving modifications to your home.  Follow the link below, updated with pretty...and some scary...pictures, for more on taking your house's temperature and what's involved...

Thermography Article...