No matter what type of weather the Wilmington area is experiencing, you can be sure that windows and doors from Pella of Wilmington can handle it. Our products are built to be energy efficient. In fact, our ENERGY STAR®-certified windows and doors1 can help reduce your energy costs. This ENERGY STAR certification is thanks to our energy-efficient features like double- and triple-pane glass, Low-E coating and glass panes built to excel in specific regions across North America. Learn more about our energy-saving glass features and technology.