Energy-efficient windows; reducing electrical consumption

In this special ASK THIS OLD HOUSE episode, the crew demonstrates several useful ways to save energy at home. General contractor Tom Silva helps a homeowner select and install energy-efficient "replacement" windows. In the ASK THIS OLD HOUSE loft, plumbing and heating expert Richard Trethewey shows host Kevin O'Connor different ways to reduce the energy needed for heating water. While making a HOUSE call, Kevin and an energy auditor discuss ways to improve a heating and air-conditioning system to reduce electrical consumption.