The fans are only temporary.....
"One only has to see the motorized fans, 50 inches in diameter, around most of the greens at Southern Hills. The tournament arranged for Precision Air Systems out of Pompano Beach, Fla., to deliver 21 of these massive fans for the PGA Championship.
They deliver air that is about 10 degrees cooler and will help keep the greens alive. The fans have been running 24 hours a day since Tuesday. Workers will remove them Thursday morning before the first round, replace them after the round and repeat the process until the PGA Championship has a winner."