Typical air leakage sites
1. Joints at windows
2. Joints between walls and ceilings
3. Ceiling light fixtures
4. Chimney leaks air continuously
5. Plumbing stack penetrations
6. Chimney penetration of ceiling
7. Vents from bathrooms and kitchen
8. Electrical outlets
9. Cable entry points for electrical service, cable and TV
10. Leaks in ductwork
11. Joints between joists and basement
12. Joints between sill and floor