Architect Jorge Pardo, former director of product development and research for the National Concrete Masonry Association (NCMA), developed a futuristic house constructed almost entirely of concrete masonry units. The Lifestyle 2000 house is designed to show that concrete masonry construction can be attractive and affordable. CONCRETE BLOCK VENEER The interlocking concrete masonry veneer will have the most immediate impact because it is designed to go with conventional 2x4-inch stud construction. Each unit has an 8x8-inch face with a horizontal jog across the center so that the block looks like two smaller units. MASONRY FORMING SYSTEM Another component of Lifestyle 2000 that should catch on quickly is the architectural unit concrete forming system. Dry-stacked concrete block are used to build the concrete forms. The concrete forming system includes two wythes of concrete block, each wythe consisting of half a block, one with a finished exposed surface for the interior and one with an unfinished surface for the exterior. POST-TENSIONED WALL Lifestyle 2000's groutless post-tensioned basement wall represents a new application of a practice common in the construction of large buildings and bridges. Like other systems in the experimental house, the post-tensioned basement wall is designed to speed construction and reduce costs. MINIATURE TROMBE WALL Located on the experimental home's southern exposure below a central window expanse, the miniature Trombe wall serves as a supplemental heat source in the winter. In the summer, changing the position of a damper converts the Trombe into a ventilator. HOME BREATHING SYSTEM Lifestyle 2000's home breathing system exhausts internal pollutants, such as radon, as well as furnace and fireplace flue gases. It also helps eliminate temperature differentials between the basement and the top floor.