While this will vary depending on the size of your home, energy usage, and other factors – on average, you can save 20% or more on heating and cooling costs. There are a variety of energy savings calculators online that will let you know how much of an impact you have on your bills as well as on the environment by entering customized information about your home. I recommend the United States Department of Energy’s Home Energy Saver
For more information check out these resources:
- Home Energy Audits
- US Department of Energy’s Home Energy Consumer Saver
- City of Seattle Guide to Energy Efficiency
- Northwest Energy Star Homes
- Advancing Solar Energy in Washington State
- US Department of Energy Efficiency and Renewable Energy
- Energy Efficient Lighting