To mix things up, here are some videos that I found particular helpful about replacement windows and the benefits of installing energy efficient windows in your home.  I didn’t make these videos but I think they are well done and give lots of good information.

How Energy Efficient Windows Work

Insights into Energy Saving Replacement Windows

Homeowners Discussing the Difference that new windows have made in their home.

For more information check out the following sites:replacementwindowschicago.net/www.efficientwindows.org/‎energy.gov/energysaver/articles/energy–efficient–windows‎