In the last episode of the Auburndale project, master electrician Allen Gallant finishes up the exterior low-voltage lighting, while inside, lighting designer Susan Arnold shows off the installed lighting plan and how she's made a house with low ceilings look more spacious. Upstairs, host Kevin O'Connor meets plumbing and heating expert Richard Trethewey in the kids' bath to see the water-saving plumbing fixtures, and a bath fan that will turn on automatically when it senses humidity in the room. Interior designer Melissa Gulley shows Kevin how a small custom rug factory in Fall River, MA, is making the carpets for the house using both old and new world technology. Out front, landscape contractor Roger Cook shows master carpenter Norm Abram the hops vines that will be planted to grow on the pergola in the spring.