A heat map evaluation is where we use a thermal imaging camera to see the problem areas of your home. This method can detect infrared radiation, here is how it works:
All objects emit infrared energy (heat) as a function of their temperature. The infrared energy emitted by an object is known as a heat signature. A thermal imaging camera is essentially a heat sensor that is capable of detecting tiny differences in temperature. The device collects the infrared radiation from objects in the scene and creates an electronic image based on information about the temperature differences. The surfaces that appear red in the view are the warmest and blue are the opposite, cold.
We also consider what the outdoor, attic and basement or crawl space temperatures are when we are using the thermal imaging camera with the blower door running.