Energy efficient windows are highly insulated structures. They preventing unwanted weather and drafts from entering your home and allow you to easily maintain your desired temperature within your home. Highly efficient windows achieve this by housing multiple panes of glass within the window, with the insulation trapped in between the panes.
Energy efficient windows are an investment for your home, as they will save you money in the long run. By locking in the air in your home, these windows lower the cost of heating and cooling your home.