That sounds good. One tool I've found that helped me find heat leaks into the attic (from the living area) is the IR sensor pistol..
I used it to check walls and ceilings around the house too. Works pretty well.
When we had the refrigerant leaking out, I used the scanner and quickly
found the Sanyo wasn't making good heat, while still using a lot of power..
Turning it off when I did, might have saved the compressor.
The repaired ODU is still making heat today. I hope it lasts for a few years anyways.
http://ecorenovator.org/forum/geothe...r-project.html
So, it's sounding like you might be doing some work on your windows.
