alphadogg writes "Data center executives from Google and other large companies are pushing back against new efficiency requirements proposed by a prominent standards group, saying they are too 'prescriptive' and don't leave them room to innovate. 'This standard defines the energy efficiency for most types of buildings in America and is often incorporated into building codes across the country,' Urs Hoelzle, Google senior vice president for operations, wrote in a post on the Google blog. Data centers are among the fastest-growing users of energy, and setting efficiency standards for them is a welcome step, he said. But he called the requirements 'too prescriptive.' Instead of setting efficiency targets and letting engineers decide how they can best meet them, the amendments specify types of cooling systems that companies should use."