You should check around all your doors and windows to see if there are any drafts. A lot of heat can be lost through a very small crack at the bottom of a door. Sealing that off with weather stripping can save you a lot of money.

If you have a problem with [water] condensation on some of your walls or other surfaces in a home, you need to have the house checked for mold.

There are three types of energy audits. Some energy providers [electric and natural gas companies] will provide them, and there are private companies that perform them using draft detectors, infrared cameras and other high-tech devices.

Conversely, if extra insulation keeps moisture in the home from escaping, the home can develop mold, which can cause a number of ailments and even pose a significant health risk.