- Check the insulation in your attic, exterior and basement walls, ceilings, floors, and crawl spaces. To determine the insulation R-values in different parts of your home, visit the Air Leaks and Insulation section.
- Check for air leaks around your walls, ceilings, windows, doors, light and plumbing fixtures, switches, and electrical outlets.
- Check for open fireplace dampers.
- Make sure your appliances and heating and cooling systems are properly maintained. Check your owner's manuals for the recommended maintenance.