The Fiber-Classic Mahogany Collection of fiberglass doors is Energy Star qualified and may be eligible for federal tax credits up to $1,500. Composite top and bottom rails offer increased rot resistance, while LVL stiles improve the doors' structural integrity. The doors' simple lines and architectural details make the Fiber-Classic Mahogany line compatible with many styles. Doors are available with a range of decorative glass designs. 800.537.8827. www.thermatru.com.