How Do I Find Air Leaks in My Window?
You may have a window leak if heating and cooling problems occur in just one of your rooms. You can pinpoint this leak by using the pressure test described above or through other methods. If you are able to rattle a window, the frame is not secure, which means air can leak through it. You can also visually inspect your window frames for gaps. You may even be able to feel an air leak if you search on a cold day, especially if you run your heating system on high; the temperature difference of the outside air should be easy to detect. For a final test, you can try shutting a window on a dollar bill and then pulling on the bill. If you can drag the bill out of the window frame, you have found the source of the leak.