Hot Spots
This is a tricky subject, as I am by no means an expert on all the subtle details, however, as I've been told, hot spots are accepted as an inhuman form. Whereas a human entity will draw heat from the air in order to manifest, an inhuman will radiate heat. This means that you may find a hot spot, rather than a cold spot. Again, a digital thermal scanner is imperative for locating, gauging and tracking these. Moreover, I would suggest the use (if available) of a thermal imaging camera. With this, you will be able to see the shape of the hot spot, instead of simply guessing.
