If your windows are old and inefficient its time to change them. Energy consumption has, for years, been one of the main reasons for improving the home and when it comes to windows you can use up to 10% of that energy especially where your windows were installed many years ago when energy consumption wasn’t such a large part of property ownership. Today, we are all very conscious about energy usage and of course saving on expenses when it comes to energy loss, having the best technology and design is key when it comes to reducing your carbon footprint. Building.