www.RemodelingMagazine.com
Remodeling Magazine’s annual “Cost vs Value” report analyses popular home improvements, including window replacements, from the standpoint of their payback.
www.RC.State.AZ.us
Log on to the website of the Arizona Registrar of Contractors to verify that a company is licensed to find out if they have a history of complaints.
www.EfficientWindows.org
This US department of Energy sponsored site provids unbiased recommendations on the selection, function and benefits ofenergy-efficient windows.
www.EnergyStar.gov
Check here for the latest information on federal energy tax credits as well as on ways to conserve energy generally.
The Better Business Bureau is another good resource for checking the track record of contractors.