A method of cleaning a raised access flooring system includes providing a vacuum cleaner for raised floor environments. The vacuum cleaner includes a body sized to fit underneath the raised access floor system, a power source supported by the body, a vacuum module supported by the body, the vacuum module being configured to intake air and exhaust air, and a drive module supported by the body. The method further includes placing the vacuum cleaner into a space formed between an original floor and a plurality of raised panels of the raised access flooring system, and operating the vacuum cleaner to perform a cleaning operation.