Actually, it may also lead to additional health risks, according to Home Energy
Your home’s heating and cooling system is designed to keep your entire home at a constant temperature. If you close a bedroom door, that puts that space under pressure and the system will be forced to draw air in from other areas. These types of air leaks are what can be found with a home energy audit. You can find some more Energy Saving Tips here: http://www.srpnet.com/energy/powerwise/energysavingstips.aspx
Want to learn more about a Home Energy Audit? check out the video!