1 July 2026

In the second half of July, work will be carried out on the air ventilation system in the Kamerlingh Onnes Building. The electric motors that supply and extract air in each section of the building are to be replaced.

During this work, air circulation in the affected areas may temporarily function less effectively. You might experience poorer ventilation and cooling when the weather is warm and possibly some noise disturbance. When it’s warm in the building, staff can open the windows for extra ventilation and cooling.

The work will take place according to the schedule below:

Date	Building section / rooms
16 and 17 July	A3, Moot Court rooms, offices in this wing and Lorentz lecture hall
20 and 21 July	B- and C-wing ground floor: tutorial classrooms and lecture halls
22 and 23 July	A-wing: offices and lecture halls, including C1.31
24 and 27 July	Library and restaurant
28 t/m 31 July	Offices on the 1st, 2nd and 3rd floors

The classrooms in question cannot be used on the days the work is being carried out. We appreciate your understanding and cooperation for the temporary disruption caused by this necessary work.