No matter what type of weather the Calgary area is experiencing, you can be confident that windows and doors from Pella of Calgary can deal with it. Our products are designed to be energy efficient. Because of that, our ENERGY STAR®-certified windows and doors1 can help lower your energy costs. This ENERGY STAR certification is a result of our energy-efficient features like double- and triple-pane glass, Low-E coating and glass panes made to excel in specific regions across North America. Learn more about our energy-saving glass features and technology.