There’s more than beautythere’s efficiency. AmeriFlow(TM) by Hart & Cooley is the leading name in air distribution products. Items are engineered by airflow professionals for minimum air resistance, resulting in quieter performance and optimum comfort which can be installed in high traffic areas. Heavy-gauge steel control valves open and close easily for years of dependable performance. AmeriFlow registers, grilles and diffusers fit most standard wall and floor duct openings. For floor applications, measure both the width and length.