qome lnsulatior elow, a technician is inspecting a home insulation reflect away 95 percent of the Sun's radiant energy. system that incorporates "radiant barrier" tech- On completion of a home, technicians check for air nology originally developed for NASA's Apollo tightness using a machine that creates a vacuum in the lunar landing program. The Radiant Barrier insulation is house and enables computer calculations of the air an adaptation of a highly effective aluminum shield used exchanged, a measure of energy efficiency. When satis- on the Apollo spacecraft and other space systems as a fied that the house has been built to its specifications, the radiation barrier. that held in or kept out heat, cold air company provides a guarantee that the home will use only and water vapor. a specified number of kilowatt hours yearly. A separate The radiant barrier is part of a broader Guaranteed meter is installed to monitor and verify the energy use by Watt SaversTM( GWS) system of "total home low energy the heating/cooling system. The system is applicable, consumption" being marketed as a joint venture of with modifications, to existing homes as well as new Guaranteed Watt Savers System, Inc., Charlotte, North structures. Carolina and Smart-House Consultants, Incorporated, Smart-House and GWS teamed up in 1982 and since Oklahoma City, Oklahoma. The GWS design technique then have effected a number of advancements in the sys- combines space technology, advanced building technology tem, such as the use of a computerized infiltrometer to and an engineering systems design approach to effect verify air tightness, and the introduction of duct sealing significant savings in home heating and cooling costs. and coating the underside of a roof with low emissivity Under the GWS systems, plans for a new home are paint in insulating existing homes. The GWS/Smart-House computer-analyzed relative to expected heat loss and network has expanded considerably over the years; there gain, then the company provides specifications - are now 15 active centers in North Carolina, South designed specifically for each structure - as to heating, Carolina, Oklahoma and Florida. cooling, ventilation and insulation. The company inspects the work of the heating, air and insulation contractors and "Guaranteed Watt Savers is a trademarkof Guaranteed Watt Savers System. Inc. installs its own Smart-House Radiant Barrier, designed to