Since the 1920s, Pella has designed, manufactured, and installed window and door products made from wood, vinyl, and fiberglass for construction and remodeling in the residential and commercial sectors. Many of its windows are energy efficient and are found under the Architect Series, Designer Series, Pella, and Impervia brand names. Pella has 10 manufacturing facilities throughout the country; its EFCO unit makes commercial windows and doors primarily in Missouri. Do-it-yourselfers can find its windows and patio doors at such stores as Lowe's.