I have a Flir E6 - EX and unfortunately thermal cameras can't see through walls. TI can see differences in the temperatures in buildings and structures. So you can see wall studs, window frames, a/c ducts, etc. These cameras only “see” heat as it radiates off of an object. It may “see” the heat coming from a house, but it can’t see into the house because the camera picks up the house’s exterior thermal image first. In fact, the thermal imaging doesn’t even see through glass because the glass has its own thermal profile.