On hot summer days, the most effective way to ventilate is with a draft in the cooler morning hours. Coordinate with your colleagues so that the draft can take place as early as possible. Then, close the windows and use sun protection.
Heat primarily enters indoor spaces through unprotected windows. Sun protection and blinds effectively shield the heat from the sun's rays. The most effective option is an external sunshade.
If possible, schedule work hours during cooler periods and in cooler rooms. Check if you can swap rooms within a department. Temperature differences between northern and southern parts of buildings are generally significant.
Many running devices continue to heat the room. Therefore, turning off unnecessary electrical devices helps.
Fans are only useful when there is no option for a draft. Fans increase the room temperature with their waste heat. Only the airflow is perceived as pleasant. Natural ventilation, on the other hand, lowers the room temperature and saves energy.
Avoid opening windows during the hottest hours. Otherwise, you won't have a way to get rid of the incoming heat.
Important: Stay well-hydrated during high temperatures!
