Air sealing is one of the most cost-effective ways to have a big impact on energy savings and comfort. Most houses built before 2000 were not air sealed – I still see new houses today that aren’t air sealed!
Armed with canned foam and a caulking gun, the blower door and infrared camera will show you where to seal the air leaks. You will be surprised where the leaks come from (hint: it’s probably not your windows).