For Electric Customers
Wall switches and outlets are another area to check for drafts leaking outside air into your home. Depending on how well your home is air sealed, switches and outlets may allow outside air to enter your living space around the plastic cover or face plate. Pre-formed insulation can be purchased at your local home improvement store to match your switch or outlet cover. Stopping these drafts will increase comfort and reduce natural gas and electricity used for heating and cooling. The insulation is available at your local home improvement retail store.
For more information, visit the Department of Energy's website
The link provided below goes to a web page with a video mainly produced by third parties to educate a public audience.