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The manufacturing process of this material, creates millions of tiny air cells, which provide excellent thermal resistance. This efficiency results in material with high DBMS (Dynamic Benefit of Massive Systems) equivalency, R-value, thermal mass and air tightness. AAC is the only wall system currently available that meets Germany's stringent energy codes without adding insulation.
This material out performs a conventional wood framed wall system, reaching a R-value of 30 when used to construct a 12" thick wall. One important reason owners choose AAC for home construction is to save money on energy. An 8-inch-thick AAC wall is more energy efficient than a 6-inch stud wall with R-19 insulation. The energy efficiency of a building product is determined by its R-value, thermal efficiency, and the effect of thermal mass. The R-value of a material is a measure of its resistance to conductive heat transfer, which is the energy that moves from molecule to molecule. The R-value of a typical 8-inch-thick AAC wall is approximately R-22, and a 12-inch wall is R-29.
The chart above demonstrates thermal mass inertia. In this study, one side of a 10-inch AAC wall is painted black to minimize heat absorption from the sun. A thermometer measured temperature changes on the exterior and interior surfaces over a twenty-four hour period. The exterior surface fluctuated over 126*F while the interior surface fluctuated only +2* F.
Explore how this long used overseas product is quickly becoming a top building choice in the United States through this article and more.
AAC was perfected in the mid-1920s by the Swedish architect and inventor Dr. Johan Axel Eriksson and the process was patented in 1924. Since 1980, there has been a worldwide increase in the use of AAC materials. New production plants are being built in Australia, Bahrain, China, Eastern Europe, India, and the United States. AAC is increasingly used by developers,architects, and home builders worldwide.