Infrared cameras photograph heat rather than objects. The camera is a heat-sensor that registers different temperature levels and converts them into a film or video image. Most cameras use digital imaging, but some use chemical infrared film. Cameras range from simple point-and-shoot types to expensive models with detailed, higher-resolution imagery.
The naked eye can’t tell where heat is leaking through home insulation. Infrared imaging can capture the exact spots where, for example, weatherstripping around a door or window isn’t doing its job. The higher the camera’s resolution, the more precisely the camera can pinpoint the heat sources. Highly sophisticated cameras are good enough to allow a contractor to trace coolant leaking from an air-conditioning system. Top camera models can also transmit the information wirelessly.