two images show the exterior of a building at night on a cold
day. The upper one shows that the exterior wall is warmer at the
foundation, over the cool basement rather than over the heated living
space! This building is actually losing more heat from the cool
basement than from the living space. Where
would you spend your money for insulation? Where would you have
spent it without data?
lower image shows a hot spot over a wall mounted radiator (under the
center window, mid-image). Some one is
paying good money to heat the great outdoors!
large range of building related problems can be found and analyzed