WE act together!

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Together, we reduced our electricity consumption by 6% and our heat consumption by 22% last winter through energy-saving behaviour and targeted technical and organizational measures. We therefore exceeded our savings targets and also made an important contribution to climate protection.

The heating period has now started again and saving energy is still relevant this winter. We will therefore continue with the tried and tested measures, with one exception: the room temperature in the offices and common rooms is now 20 °C again. Please observe this requirement for your area.

You can also make an additional contribution to improving energy efficiency with further measures. Please take a look at the following checklists and information. We would be very grateful if you would follow this advice.

If you encounter any difficulties, please let us know - and also if you have any other suggestions for saving energy. To the Service Desk form

On Jan. 24, 2023, the third and final day of action for the "We Act Together" energy-saving campaign took place at the Campus Center from 4 p.m. to approximately 8 p.m. This time the focus was on social sustainability. This is because results from the latest wave of the Socio-Economic Panel (SOEP) show that all households are negatively affected by energy price increases. Therefore, on this day, a variety of information and counseling services were offered to students and employees: inside the time from 4 - 6 pm. From 6 p.m. on, the facts of the University of Kassel were put under the microscope together, according to the motto: "My university is doing something!" - Among other things, the plans of the new Kassel Institute for Sustainability were discussed with Prof. Dr. Andreas Christian Braun, and suggestions were collected on what each individual can do and what we can do together. To the presentations...

On St. Nicholas Day, December 6, 2022, the 2nd action day of the energy saving campaign "We act together" took place in the Campus Center from 11 a.m. to 4 p.m. and once again ensured that awareness was created for the more efficient use of energy. All students and employees were invited to participate in the hands-on activities offered by the Green Office together with the university's press office. On site, interested people could, for example, face the "Dragons of Inaction" and find out what prevents sustainable action, or learn how to optimize their own energy consumption. In addition, there was a Santa surprise for everyone who stopped by.

Those who question their behavior can not only save electricity and heat, but also achieve a lot for the protection of the climate & environment! For the 1st action day of the energy saving campaign "We act together" on 22.11.2022 in the Campus Center from 11 a.m. to 4 p.m. not only thought-provoking ideas for saving energy were given, but also hands-on activities were offered to make climate protection tangible. There was delicious tea from the Studierendenwerk, mini-breaks from the University Sports Center and also the course on the ecological footprint of the Green Office, and much more.


On 6.12.22 and 24.01.22, the 2nd and 3rd action day of the energy saving campaign "We act together", further activities will be offered. We already invite students and employees to stop by.

Energy saving checklists


  • Break? Give your monitor a break and turn it off.
  • Use the energy saving settings of your devices.
  • Fresh air? Always ventilate, turn the heating to frost protection.
  • Set the radiator thermostat to level 3 and (if possible) do not cover it with furniture.
  • Smartphone charged? Disconnect it from the power supply.
  • Break during the video conference? Turn off the camera or leave the conference.
  • Stand-by off or unplug.
  • Print sparingly.
  • Sunshine? Take advantage of daylight.
  • Improve fitness? Take the stairs instead of the elevator ;-)
  • End of the day? Shut down and turn off all appliances, close shutters and turn off heating.
  • No one in the room anymore? Always turn off the lights when leaving the room.

Print checklist

... and hang it in the office as a reminder!


  • Coffee brewed? Keep it warm in a thermos.
  • Fancy some tea? Heat only the amount of water you need.
  • Dishwasher full? Use the energy-saving program.
  • Kitchen appliances ready for use? Switch them off when not in use (e.g. with a power strip).
  • Several refrigerators? Check if one is enough and set the temperature to a minimum of 7°C.
  • No one in the room anymore? Always turn off the light when leaving the room.

Print checklist

... and hang it in the kitchenette!


  • Stand-by off or pull out plug.
  • Set heating to just below level 3.
  • Fresh air? Always ventilate, turn the heating to frost protection.
  • No one in the room anymore? Always turn off the light when leaving the room.

Print checklist

... and hang it in the meeting room!

Save heat & Ventilate properly


WE ALL have to pay attention to heating efficiently and economically. In the office, for example, a guideline value of 20 °C applies. The correct use of thermostats is of decisive importance. WE have it in our own hands! Set the radiator thermostat to a value between 2 and 3 when you are present and to 1 at the end of the day. For longer absences, e.g. homeoffice or weekends, set the thermostat to frost protection.


The most efficient way to ventilate is with the windows wide open and the heating turned down. This way, just a few minutes are enough for a complete air exchange.

Save heat

1 °C less saves 6% energy. So if the temperature is reduced from 23 °C to 20 °C, we save 18 % energy.
The temperature cannot be set centrally in many offices, which means we are all called upon to do our part to save energy and set the radiator thermostat of our office heating to level 3.
Only together can we achieve this goal - every contribution counts!

Save heat: PDF - Document - PDF 27,47 KB

Ventilate properly

Proper ventilation also helps: with the windows and doors wide open and the heating turned down, just a few minutes are enough for air exchange. Afterwards, the office doors to the hallway are closed again, so the hallways are heated less or not at all.

Cross ventilation:
Winter 2 - 4 minutes
Spring / Autumn 4 - 10 minutes
Summer 12 - 20 minutes

Ventilate properly: PDF - Document - PDF 27,47 KB


Focus on mobility

There are many ways to shape your own mobility
and save energy in the process:

  • Switch to a bicycle
  • Use student and state tickets
  • Form car pools
  • Take the stairs instead of the elevator
  • Video conferencing instead of business trips

We act together - saving energy for the climate

WE ALL can become active, save energy, become less dependent on fossil fuels and protect the climate at the same time!

In recent years, there have already been some technical and structural optimizations at the University of Kassel and further investments and measures are planned. With sustainable and conscious behavior, an additional 10% of energy can be saved. So with small changes in behavior, we can make an immediate difference. Are you with us?


The Green Office has compiled a few tips for saving energy in checklists for you.


The Green Office is the central contact, organization and coordination point for the topic of sustainability in the company and campus at the University of Kassel. We advocate sustainable development at the operational level with a great deal of commitment and genuine conviction, support and communicate sustainability activities, and network the various stakeholders. In doing so, we work closely with the departments responsible for implementing sustainability measures. Do you have a project idea? Get in touch with us! 

Service instruction & Co

Rooms in which predominantly sedentary activities are carried out may be heated to a maximum of 20°C. This temperature is also the minimum temperature and also applies to lecture halls, seminar rooms and other common areas.

Common areas and circulation areas that are not occupied areas (corridors, stairwells, storage and technical rooms, etc.) may not be heated.

Heating systems are operated with lowered operating temperature from Monday to Friday between 18:00 and 06:00 (night setback). On weekends, the operating temperature is generally lowered.

Exceptions to the lowered operation of the heating systems are the central library and the LEO learning location during regular opening hours as well as buildings/rooms in which scheduled teaching events take place on weekdays between 18:00 and 06:00 or on weekends.

Rooms that are booked for courses and other events must be reported back to the room administration as early as possible if events do not take place.

In case of absence for several days (e.g.: home office, weekend, vacation, illness), set the thermostatic valves to level 1 - 1.5.

Computers must be turned off at the end of service unless continuous operation is required.

The use of additional heaters is prohibited for sustainability reasons! Additional heaters pose a significant fire hazard and can significantly destabilize the power supply and are harmful to the climate!