An air distribution blower housing for an air handler such as a residential furnace is designed with a volute-shaped outer wall that has an exponentially increasing expansion angle in the direction of air flow through the blower housing for at least a portion of the volute-shaped outer wall length. The rubber composition of the present invention contains: a rubber component made of at least one type of diene-based polymer; and a copolymer resin obtained by copolymerizing \u03b1-methylstyrene based monomer and aromatic vinyl monomer. A plurality of memory cell storage capacitors are associated with the field effect transistors. The media have very high specific resistance values, low threshold voltages, short response times and high birefringence values \u0394n, while maintaining other boundary conditions. A restriction portion of a displacement preventing plate restricts a movement of the side portions in the width direction in a portion of each of the side portions located between an end on the grip portion side of the fixture and an end on the hollow space side of the base portion.