1) Many homeowners make mistakes when replacing windows that reduce customer satisfaction and increase costs, such as lack of planning, budgeting, and choosing inexperienced installers. 2) Proper planning includes gathering information, setting a budget, and choosing styles that match the home. Replacing multiple windows at once is more cost effective than one by one. 3) The height and placement of replacement windows in Atlanta impacts energy costs, so installers recommend positioning them scientifically to control temperature.