Air sealing is an inexpensive way to lower energy costs and improve comfort. Proper insulation is important to keep your home cool in the summer and warm in the winter.

Air Leaks

Seal from the inside. Seal gaps and hols in walls, floors, and ceilings with caulk or foam sealant. Look for cracks around windows and where wires and pipes pass through.
Caulk along baseboards with a clear sealant.
Caulk around plumbing penetrations that come through walls beneath bathroom and kitchen sinks.
Caulk electrical wire penetrations at the top of the interior walls in the attic.
Ensure windows and doors are properly weather-stripped and use door sweeps.
Ensure window A/C unites are weather-stripped.
Caulk around storm windows and basement windows.

Have your duct work checked for leaks. Leaks at the return, air handler and supply can be a major source of high bills. For mobile homes, check at the grill, cross over duct and down flow air handler, for leaks.
Ensure attic access door closes tightly and is insulated.
Make sure insulation in your attic does not block sof fit vents.
Verify your ducts are tightly connected to your HVAC equipment. Well sealed and insulated ducts can save up to 10%.
Insulate electric wall outlets and wall switches with foam pads.