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

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In case anyone is interested, I have posted quite a few images to the PHOTOS section illustrating what the right thermal imager, used by a properly-trained individual, can show you. What you can see and do with many of today's thermal imagers when it comes to building sciences, diagnostics, and energy is nothing short of astounding. When used properly in conjunction with a blower door, the possibilities increase further still. I encourage everyone to check it out, and also actively participate in this discussion area. If you have any questions or would like to chat about what you can and can't do, please feel free to give me a shout.
Professional Equipment has the Flir i7 down to $1,695 (but you have to call).
If you are on this forum and also have an interest in thermal imaging tools and building applications, please check out our INFRARED THERMOGRAPHY USERS group in the group section:

http://homeenergypros.lbl.gov/group/infraredthermographyusers

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