Within the limitations of the building systems, Federal agencies must—
(a)
Operate heating and cooling systems in the most overall energy efficient and economical manner;
(b)
Maintain temperatures to maximize customer satisfaction by conforming to local commercial equivalent temperature levels and operating practices;
(c)
Set heating temperatures no higher than 55 degrees Fahrenheit during non-working hours;
(d)
Not provide air-conditioning during non-working hours, except as necessary to return space temperatures to a suitable level for the beginning of working hours;
(e)
Not permit reheating, humidification and simultaneous heating and cooling; and
(f)
Operate building systems as necessary during extreme weather conditions to protect the physical condition of the building.