The next-generation Supercharger tankless water heater units from Houston-based Seisco International utilize DuPont's engineering thermoplastics in several key components and have been designed to help homeowners meet the newly updated National Appliance Energy Conservation Act requirements. Seisco's president David Seitz says the new standards could drive up the cost and size of tank-type water heaters because efficiency technology will have to be added to the tanks that are 55-gal or larger.