Antique Door Hardware; Geothermal Home Heating and Cooling Ask This Old House : Season 9 Episode 22

Host Kevin O'Connor and general contractor Tom Silva demonstrate how to select and install antique and reproduction door hardware. Then, Kevin and Tom, along with plumbing and heating expert Richard Trethewey and landscaping contractor Roger Cook ask, "What is it?" Afterward, Richard shows a homeowner how a geothermal home heating and cooling system works.