Today’s IR systems are easy to use. But interpretation requires good camera skills, an understanding of heat transfer, radiation physics, conditions for inspections, and building diagnostics.
See "Breakthroughs In Infrared Cameras"
by John Snell
Home Energy, Jan/Feb, 2006
Energy auditors may use thermography—or infrared scanning—to detect thermal defects and air leakage in building envelopes.
See "Thermographic Inspections"
from Energy Savers - U.S. Department of Energy