Energy Saving Tips


How can I contribute to saving energy?

A researcher examines a heating element Copyright: © Peter Winandy

Energy Saving Tips


  • Turn on the lights only when necessary.
  • When you leave a room for an extended period of time, the lights should be turned off, both in your offices and in the hallways, stairwells and other rooms.


  • To achieve a room temperature of 19 °C, position 2 on the thermostatic valves is sufficient. If you have any technical problems, please contact the
  • Are you going to be absent for several days? Turn the thermostatic valves back to the antifreeze position (*).
    ► Did you know that lowering the room temperature by 1 °C saves about 5 percent of heating energy?
  • Ventilating several times a day is better than having the windows permanently tilted. Closed windows ensure that warm heating air is not permanently escaping to the outside.
  • As such, avoid permanent ventilation by leaving the windows tilted, especially when the outside temperature is cold. Ventilating regularly (approx. 5 minutes each time) is demonstrably much more energy-efficient.
  • Remember to turn down the heat when you are ventilating the room.
    ► Did you know that proper ventilation behavior can save up to 30 percent of heating energy?
  • Be careful not to obstruct radiators with furniture or other such items.
  • Keep doors closed: A simple energy-saving tip that has a big effect. This is especially true for the door to the hallway, which may lead into the drafty entrance area.

Office equipment

  • Use the energy saving mode of your electrical appliances.
    • Bye, Bye Standby: Switch off unused electrical appliances. Avoid stand-by operation. Check which electrical devices are in operation at your workplace:
    • Do I really need the second monitor?
    • Can I share the printer with other colleagues? Can decentralized servers be switched off when they are not in use?
    • Is the refrigerator needed or is it empty and can be switched off?
      Use power strips with toggle switch (RWTH shop ► socket).
      Turn off the computer when not in use including monitors.
      The coffee machine does not need to be switched on all the time.
  • Boil water in quantities as needed: avoid filling the kettle completely if you only want to make a single cup of tea.
  • Reduce the number of minutes after which the computer switches off the screen, etc. (Settings ► Mains operation & energy saving)
  • Set bookmarks: Bookmark frequently visited pages, because every search engine query sends servers around the world into overdrive, and they consume electricity. Alternative search engines such as Ecosia have already committed themselves to climate protection by reforestation.
  • Avoid email attachments: Place files on the server or sciebo and send only the link to the document.
  • Zoom conferences: After the personal greeting, many conversations can continue with the video function turned off.
  • Disconnect power supply units and chargers from the mains after charging is complete.

Did you know that energy-conscious use of electrical appliances saves about 10 percent of electrical energy?


  • Use the shading devices, where these are available: Ventilate heavily in the morning and let cool air into the rooms, then close the windows including the shutters or blinds.
    Ideally, you should close the blinds that face east in the evening.
  • Turn off ventilation and cooling in unused rooms. Check:
    • Where can their use be avoided? Can you possibly create a draft? Or could you run the fan only at the lowest speed?
  • The room air in cooled rooms should not be colder than 25 °C.
  • Always observe the workplace guidelines and safety regulations.

Get active

  • Exercise: Take the stairs if this is possible for you. Moving around now and again is good for the circulation and saves a lot of electricity.
  • Potential for savings: Take a tour of laboratories, workshops and test halls with your colleagues and see how energy can be saved and where machine running times can be minimized.