Replacement Windows and Doors from Pella of Fargo In 1925 Pella began making beautiful wood windows that would withstand the elements for years. Today we’re also known for various shapes and sizes of specialized, durable fiberglass and vinyl replacement windows. You can also look to us for distinctively crafted entry and patio doors. And, Pella® windows and doors provide energy-efficient products that meet or exceed ENERGY STAR® certification in all 50 states and in Canada. The Pella Promise At Pella of Fargo, all that we do connects to our exclusive promise to customers: The Pella Promise.