This test allows you to actually feel where air loss is occurring. Blower door tests can also identify health hazards created by backdrafting. These tests are also able to project whether your home has enough natural infiltration the ability to draw in fresh air to have good indoor air quality. Consult your local utility to see if they offer blower door tests or can recommend a qualified professional. After you have sealed air leaks in your home, make sure your home is properly insulated.
Insulation helps keep homes cool in the summer, and warm in the winter.
For more detailed information on caulking, weather-stripping and insulation, consult the Home Series issues, Home Tightening and Insulation .