Jeff shows Kevin how he's framing the net zero house. Richard demonstrates heat loss and gain to design a balanced HVAC system. He and Don visit the International Builders Show. Now that the house is open, Kevin can see the old wiring and plumbing.
America's favorite home improvement series, the Emmy Award-winning THIS OLD HOUSE, with host Kevin O'Connor, general contractor Tom Silva, plumbing and heating expert Richard Trethewey, landscape contractor Roger Cook and master carpenter Norm Abram.