"The term "negawatt" has come to indicate saved, or negative, watts from measures that reduce energy consumption. However, not all negawatts come at an equal cost. In the particular case of building weatherization, some homes have acute but focused problems which can be remedied with relatively simple fixes, while others have pervasive problems that cost a lot more to remedy for the same savings. Clearly, it makes better economic sense to spend precious dollars on the cheap negawatts. We are developing a number of technologies to mine these negawatts effectively, ranging from wide-area scanning with Long Wave IR to personal energy consumption measurement."