Bob talks with factory representative Chris Hoff and heating contractor Peter Lydon during the installation of a Buderus high-efficiency boiler. They note several features that improve the unit's efficiency, including stainless-steel burner tube, insulated jacket and sophisticated Honeywell controls.

Bob visit the Buderus boiler manufacturing plant with Chris Hoff to see how the house and water heater is made.

Bob meets Jack O'Leary, the plumbing and heating contractor for this remodeling project. They discuss the old heating unit, which was an oil-fired steam system that used radiators throughout the house. The house has doubled in size since adding a new addition, and the old unit can't handle the new load. It was too costly to add another steam unit, so they decided to go with an oil-fired boiler. This works well for the homeowner, since oil is cheaper than electric, and gas isn't available in the area.