Deena Pantalone gives a tip to maintain windows, which promotes overall energy efficiency properly. This video tells you when to replace them and how to keep them in great shape. Deena Pantalone knows that windows are often the most neglected area of the homes. That's why she shows whether you need a complete set of new windows or to replace just some parts like a window pane or glass. This is much less expensive than changing the entire window. Deena Pantalone has been with National Homes for 20 years and responsible for all philanthropic efforts for the National Homes Group of Companies.