The following benefits of uPVC windows and doors in your home? Improves passive solar heating and cooling. It provides fire exits and natural ventilation. Providing exit and entry to the building. Increases comfort and provides natural lighting. Gives a beautiful view if the location is right, especially if you have a uPVC Frame. Prevents mold growth and other harmful condensation. Save money by improving the function of air conditioners and furnaces. Management of condensation if energy-efficient windows allow interior warming.