| The only method I know of to measure heat loss involves a thermal imaging system (typically a FLIR camera) and a large turbo fan. The tests are usually conducted in the evening or night time to take advantage of the cooler outside air compared to inside. The fan is set up in a door so that the exhaust is directed from inside the house to the outside environment, thus creating a negative pressure within the residence. The IR camera can then be used to detect penetration of cool air into the structure (as the negative pressure will draw air into the house from outside), such as around windows, through electrical outlets, between baseboards, etc. When the different penetration sites have been identified, you can implement corrective actions to halt the air movement. These may include caulking around windows, installing insulated face plates, and making sure the exterior is weathersealed.
I have tried to use an IR camera around my own home to see where thermal bridges or cool spots are, but it can be difficult to really determine what is occurring. For example, is the thermal contrast missing insulation, or just a shaded spot of the house? |