126 North Street, Portland, Maine.
About three years ago, the owner of this 4-unit apartment building took advantage of a free "energy audit" program offered by the local gas utility. The "auditor" examined the furnace and the windows and determined that the building was in "good shape," despite the fact that the building had a $5,000 annual heating budget. The owner contacted us, and we spent four days improving the walls, basement and attic. Now, actual heating costs have been slashed by 35 percent.