An infrared camera eyed temperature differences around the house, and a blower set in the doorway identified drafty spots.
After a four-hour audit of Justin Pettibone’s northeast Grand Rapids home, contractors compiled a list of energy-efficient improvements.
“You could literally see streaks of cold coming through here,” said Pettibone, running his hand along a living room window. “They found that if you added all the gaps in windows and doors, it would equal a two-and-a-half-foot hole in our house."
As a result of the audit, Pettibone now plans to make more than $10,000 in home improvements: more insulation and a new furnace, water heater and central air conditioner. The estimated reduction in energy use: 28 percent.