Sidelites on an entry door help bring light into a home, but Vented Sidelites also let in fresh air. Available on the Fiber-Classic Oak Collection and Smooth-Star product lines, the fiberglass doors come in a range of options such as one hinged door and two-hinged sidelites. Door stile edges and a wide mullion add strength when doors are open. Cost: $1,606 to $2,400.Therma-Tru. 800-537-8827. www.thermatru.com.