The halls must be tidied and "reset" after all activities.
Resetting means that all equipment needs to be put back in place, and the room is left neat and tidy, ready for the next activity.
Please remember to turn off all lights. The concert halls have lamps that generate heat, which is not good for pianos and other instruments. Consider the environmental aspect as well; the lamps consume a lot of power. Each hour they are on, reduces the lifespan of the bulbs.
If the AV system has been used, make sure to press “Avslutt” (“end”) on one of the touch panels before leaving the hall.