There may be one or two inspectors in the country that take wet and dry bulb readings but that may be exagerating. They are generalists and temps taken by home inspectors is either going to be a thermometer in a supply vent or IR readings throughout the home to get a general idea of operation.

No, readings at the supply and return mean about nothing but GENERAL operation and other areas of inspection added in with that will allow them to give a GENERAL idea of the systems condition and operation.

So in saying that the IR readings do not mean nothing but they actually do mean something. As in the general overall view added in with other areas of inspection of the system. That is like saying we should bring gages with us to test the charge of the system. There may be one or two inspectors that do that but I personally do not know any.

Oh well, this is all old info but I figured I would waste my time posting it.

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Ted Menelly
Castle Home Inspection Services
www.inspectmycastle.com