Abstract: A portion of a chassis comprised of a material forming a portion of the exterior of the chassis and a high-density flexible material adjacent an inner surface of the portion of the chassis with air holes formed contiguously through both the portion of the chassis and the high-density flexible material.

Abstract: A portion of a chassis comprised of a material forming a portion of the exterior of the chassis and a high-density flexible material adjacent an inner surface of the portion of the chassis with air holes formed contiguously through both the portion of the chassis and the high-density flexible material.

Abstract: A cooling fan system has a fan assembly that is removably housed in a chassis. The fan assembly receives electrical power, and the fan blades rotate when housed inside the chassis. As the fan assembly is removed from an opening in the chassis, the power to the fan assembly is disconnected, but the fan blades may continue to rotate. A mechanical stopper, such as a row of bristles that extends into the opening in the chassis, interferes with the rotation of the fan blades as the fan assembly is removed from the chassis. The mechanical stopper stops rotation of the fan blades, thereby preventing harm to the user removing the fan assembly. After the fan assembly is completely removed from the chassis, a spring-loaded door closes the opening in the chassis further protecting the user from contacting adjacent spinning fan blades or hazardous energy sources within the chassis.