Thanks Kevin for the detailed response.

Of course I do understand the difference in the 3 different devices but it seems that if you temp gun the wall thermometer the two temp should be pretty darn close rather 10 degrees F??? I also put the probe right next to the wall thermometer too and it read 5 degrees F. Something tells me the probe, obviously a thermocouple device is most accurate, and it falls right between the other two. The spring tech wall job is cheap and probably the most suspect. The temp gun has no calibration facility as some models do so maybe that is the issue there, e.g., that it was never properly calibrated.

Never the less, as it stands I don't have any confidence in any of them.

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