An infrared thermometer can help you find issues with air leaks and insulation by allowing you to get a quick read on a walls temperature. The infrared thermometer can pin point issues using its laser target. This video is a demo of an infrared thermometer from General Tools and Instruments that was shot at the 2011 AHR Expo. You can quickly recover the cost of this device by finding issues that wouldn’t be visible to the naked eye. View Video.