From an article in the Stoutonian:

In a report released by Wisconsin’s Department of Administration, the University of Wisconsin-Stout has once again been found to be the most energy-efficient campus in the UW System.

The report “Energy Use in State-Owned Facilities” based its findings on the energy consumption of all UW campuses. Energy consumption is monitored through the campuses’ utility bills and fuel consumption. UW-Stout has led the UW System in energy efficiency for over 10 years. Last year, the report found UW-Stout to be 30 percent more efficient than the UW System’s average.

According to UW-Stout’s media release and Physical Plant Director Ted Henzel, energy efficiency comes from the precise maintenance and cleaning of the school’s physical plant by UW-Stout’s maintenance workers.